US10736044B2 - Method and device for controlling transmission power of user equipment in beamforming system - Google Patents

Method and device for controlling transmission power of user equipment in beamforming system Download PDF

Info

Publication number
US10736044B2
US10736044B2 US16/347,440 US201716347440A US10736044B2 US 10736044 B2 US10736044 B2 US 10736044B2 US 201716347440 A US201716347440 A US 201716347440A US 10736044 B2 US10736044 B2 US 10736044B2
Authority
US
United States
Prior art keywords
terminal
base station
information
transmission
transmitted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US16/347,440
Other languages
English (en)
Other versions
US20190268852A1 (en
Inventor
Hyunseok RYU
Namjeong LEE
Jeongho Park
Jiyun Seol
Hyukmin SON
Peng XUE
Hyunkyu Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority claimed from PCT/KR2017/012394 external-priority patent/WO2018084626A1/ko
Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, NAMJEONG, PARK, JEONGHO, RYU, HYUNSEOK, SEOL, Jiyun, XUE, Peng, YU, HYUNKYU, SON, Hyukmin
Publication of US20190268852A1 publication Critical patent/US20190268852A1/en
Application granted granted Critical
Publication of US10736044B2 publication Critical patent/US10736044B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss

Definitions

  • the present disclosure relates to a method for controlling power of a terminal in a beamforming system, and more particularly, to a method and apparatus for supporting an uplink power control of a terminal according to a change of a beam.
  • the present disclosure relates to 3GPP NR synchronization signals, essential system information (required for initial access and random access procedure), measurement RS design, synchronization signal and physical broadcast channel (PBCH) design, and synchronization signal (SS) block design.
  • 3GPP NR synchronization signals essential system information (required for initial access and random access procedure)
  • measurement RS design synchronization signal and physical broadcast channel (PBCH) design
  • PBCH physical broadcast channel
  • SS synchronization signal
  • the 5G or pre-5G communication system is also called a ‘Beyond 4G Network’ or a ‘Post LTE System’.
  • the 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher data rates.
  • mmWave e.g., 60 GHz bands
  • MIMO massive multiple-input multiple-output
  • FD-MIMO Full Dimensional MIMO
  • array antenna an analog beam forming, large scale antenna techniques are discussed in 5G communication systems.
  • RANs Cloud Radio Access Networks
  • D2D device-to-device
  • wireless backhaul moving network
  • cooperative communication Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like.
  • CoMP Coordinated Multi-Points
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC sliding window superposition coding
  • ACM advanced coding modulation
  • FBMC filter bank multi carrier
  • NOMA non-orthogonal multiple access
  • SCMA sparse code multiple access
  • the present disclosure has been made in order to solve the above problems, and an aspect of the present disclosure provides a method and apparatus for controlling transmission power, and further, an aspect of the present disclosure provides a method and apparatus for an operation of a terminal and a base station for operating an uplink transmission power control according to a change of a beam in a beamforming system.
  • Another aspect of the present disclosure provides a method and apparatus for transmitting a synchronization signal and/or a control channel, and further, another aspect of the present disclosure provides a transmission method of a downlink (DL) common control channel except for synchronization and a method for transmitting a synchronization period in a system in which the synchronization period is variable, and provides synchronization signal design and PBCH scrambling sequence design method according thereto.
  • DL downlink
  • a method for determining transmission power of a terminal includes: receiving a terminal-specific transmission power parameter from a base station; determining transmission power of the terminal based on the terminal-specific transmission power parameter and a subcarrier spacing allocated to the terminal; and transmitting an uplink signal based on the determined transmission power.
  • a terminal includes: a transceiver configured to transmit and receive a signal; and a controller configured to control to receive a terminal-specific transmission power parameter from a base station, determine transmission power of the terminal based on the terminal-specific transmission power parameter and a subcarrier spacing allocated to the terminal, and transmit an uplink signal based on the determined transmission power.
  • an operating method of a base station includes: transmitting a message including subcarrier spacing configuration information to a terminal; transmitting a terminal-specific transmission power parameter to the terminal; and receiving an uplink signal from the terminal, in which transmission power of the uplink signal is determined based on the terminal-specific transmission power parameter and the subcarrier spacing configuration information.
  • a base station includes: a transceiver configured to transmit and receive a signal; and a controller configured to control to transmit a message including subcarrier spacing configuration information to a terminal, transmit a terminal-specific transmission power parameter to the terminal, and receive an uplink signal from the terminal, in which transmission power of the uplink signal is determined based on the terminal-specific transmission power parameter and the subcarrier spacing configuration information.
  • the method for efficiently controlling power may be provided. Further, according to an embodiment of the present disclosure, it is possible to minimize interference caused to a neighboring cell through a power control according to a change of a beam in the system using beamforming.
  • the method for transmitting a synchronization signal and a control channel may be provided. Further, according to an embodiment of the present disclosure, it is possible to transmit the transmission method of a DL common control channel except for synchronization and a synchronization period in the system in which the synchronization period is variable.
  • FIG. 1A is a diagram illustrating an example for transmission of a parameter for controlling transmission power of a terminal according to an embodiment of the present disclosure
  • FIG. 1B is a diagram illustrating an example for transmission of a parameter for controlling transmission power of a terminal in a random access process according to an embodiment of the present disclosure
  • FIG. 1C is a diagram illustrating an example of an operation of a terminal for controlling transmission power of the terminal in a random access process according to an embodiment of the present disclosure
  • FIG. 1D is a diagram illustrating another example of an operation of a terminal for controlling transmission power of the terminal in a random access process according to an embodiment of the present disclosure
  • FIG. 1E is a diagram illustrating another example of an operation of a terminal for controlling transmission power of the terminal in a random access process according to an embodiment of the present disclosure
  • FIG. 1F is a diagram illustrating an example of a parameter for controlling transmission power of a terminal after RRC connection setup according to an embodiment of the present disclosure
  • FIG. 1G is a diagram illustrating an example of another parameter for controlling transmission power of a terminal after RRC connection setup according to an embodiment of the present disclosure
  • FIG. 1H is a diagram illustrating an operation of a base station and a terminal related to a change of an uplink transmission beam of the terminal based on power headroom reporting (PHR) according to an embodiment of the present disclosure
  • FIG. 1I is a diagram illustrating an example of an operation of a terminal when using different subcarrier spacings in one cell (or by one base station) according to an embodiment of the present disclosure
  • FIG. 1J is a diagram illustrating an example of a subframe for transmitting uplink data and control information according to an embodiment of the present disclosure
  • FIG. 1K is a diagram illustrating another example of a subframe for transmitting uplink data and control information according to an embodiment of the present disclosure
  • FIGS. 1LA and 1LB are diagrams illustrating another example of a subframe for transmitting uplink data and control information according to an embodiment of the present disclosure
  • FIGS. 1MA and 1MB are diagrams illustrating another example of a subframe for transmitting uplink data and control information according to an embodiment of the present disclosure
  • FIG. 1N is a diagram illustrating an example of transmission of a reference signal for channel sounding according to an embodiment of the present disclosure
  • FIG. 1O is a diagram illustrating another example of reference signal transmission for channel sounding according to an embodiment of the present disclosure
  • FIG. 1P is a diagram illustrating an operation of a terminal and a base station according to an embodiment of the present disclosure
  • FIG. 1Q is a diagram illustrating a configuration of a terminal according to an embodiment of the present disclosure.
  • FIG. 1R is a diagram illustrating a configuration of a base station according to an embodiment of the present disclosure
  • FIG. 2A is a diagram illustrating an example of Alternative scenario 1 according to an embodiment of the present disclosure
  • FIG. 2B is a diagram illustrating an example of Alternative scenario 2 according to an embodiment of the present disclosure.
  • FIG. 2C is a diagram illustrating an example related to neighboring cell measurement of Alternative scenario 1 according to an embodiment of the present disclosure
  • FIG. 2D is a diagram illustrating another example of Alternative scenario 1 according to an embodiment of the present disclosure.
  • FIG. 2E is a diagram illustrating another example of Alternative scenario 1 according to an embodiment of the present disclosure.
  • FIG. 2F is a diagram illustrating a unit of a signal that is beam-swept in a multi-beam system including a block, a burst, and a burst set (continuous burst) according to an embodiment of the present disclosure
  • FIG. 2G is a diagram illustrating a unit of a signal that is beam-swept in a multi-beam system including a block, a burst, and a burst set (discontinuous burst) according to an embodiment of the present disclosure
  • FIG. 2H is a diagram illustrating a cyclic shift index corresponding to an m-th block of a burst set for the number of burst in the burst set according to an embodiment of the present disclosure
  • FIG. 2I is a diagram illustrating a cyclic shift index 2 corresponding to an m-th block of a burst set for the number of burst in the burst set according to an embodiment of the present disclosure
  • FIG. 2J is a diagram illustrating a cyclic shift index corresponding to an m-th block of a burst set for the number of burst in the burst set according to an embodiment of the present disclosure
  • FIG. 2K is a diagram illustrating a root index and a cyclic shift index corresponding to an m-th block of a burst set for the number of burst in the burst set when a start point of the burst set is not known according to an embodiment of the present disclosure
  • FIG. 2L is a diagram illustrating a root index and a cyclic shift index 2 corresponding to an m-th block of a burst set for the number of burst in the burst set when a start point of the burst set is not known according to an embodiment of the present disclosure
  • FIG. 2M is a diagram illustrating a root index and a cyclic shift index 3 corresponding to an m-th block of a burst set for the number of burst in the burst set when a start point of the burst set is not known according to an embodiment of the present disclosure
  • FIG. 2N is a diagram illustrating the number of antenna port, and a root index and a cyclic shift index corresponding to an m-th block of a burst set for the number of burst in the burst set when a start point of the burst set is not known according to an embodiment of the present disclosure
  • FIG. 2P is a diagram illustrating multiplexing of a PSS, SSS, TSS, PBCH, and reference signal for PBCH decoding in an SS block according to an embodiment of the present disclosure
  • FIG. 2Q is a diagram illustrating multiplexing 1 of a PSS, SSS, TSS, and PBCH in an SS block according to an embodiment of the present disclosure
  • FIG. 2R is a diagram illustrating multiplexing 2 of a PSS, SSS, TSS, and PBCH in an SS block according to an embodiment of the present disclosure
  • FIG. 2S is a diagram illustrating multiplexing 3 of a PSS, SSS, TSS, and PBCH in an SS block according to an embodiment of the present disclosure
  • FIG. 2T is a diagram illustrating multiplexing 4 of a PSS, SSS, TSS, and PBCH in an SS block according to an embodiment of the present disclosure
  • FIG. 2U is a diagram illustrating a configuration of a terminal according to an embodiment of the present disclosure.
  • FIG. 2V is a diagram illustrating a configuration of a base station according to an embodiment of the present disclosure.
  • a terminal may be referred to as user equipment (UE), or the like.
  • UE user equipment
  • a base station may be referred to as an eNB, a gNB, a transmission and reception point (TRP), or the like.
  • the embodiment of the present disclosure provides a method and apparatus for controlling transmission power. Further, the embodiment of the present disclosure includes a method and apparatus for an operation of a base station and a terminal for controlling a transmission power of data and control channels transmitted in uplink of the terminal in a beamforming system.
  • a transmission power control for an uplink data channel (physical uplink shared channel (PUSCH)) of an LTE cellular communication system is as represented by Equation 1-a below.
  • P PUSCH ⁇ ( i ) min ⁇ ⁇ P CMAX ⁇ ( i ) , 10 ⁇ log 10 ⁇ ( M PUSCH ⁇ ( i ) ) + P 0 ⁇ ⁇ PUSCH ⁇ ( j ) + ⁇ ⁇ ( j ) ⁇ PL + ⁇ TF ⁇ ( i ) + f ⁇ ( i ) ⁇ ⁇ [ dBm ] Equation ⁇ ⁇ 1 ⁇ - ⁇ a
  • Equation 1-a represents P PUSCH (i), transmission power of the PUSCH which is a physical channel for uplink data transmission in an i-th subframe of the terminal.
  • P 0_PUSCH is a parameter configured by P 0_NOMINAL_PUSCH +P 0_UE_PUSCH , and is a value informed by the base station to the terminal through higher layer signaling (RRC signaling).
  • RRC signaling higher layer signaling
  • P 0_NOMINAL_PUSCH is a cell-specific value configured by 8-bit information and has a range of [ ⁇ 126, 24] dB.
  • P 0_E_PUSCH is a UE-specific value configured by 4-bit information and has a range of [ ⁇ 8, 7] dB.
  • the cell-specific value is transmitted by the base station through cell-specific RRC signaling (system information block (SIB)), and a user equipment (UE)-specific value is transmitted by the base station to the terminal through dedicated RRC signaling.
  • SIB system information block
  • UE user equipment
  • ⁇ (j) is a value for compensating path-loss
  • the base station cell in the case of ⁇ (0) and ⁇ (1), the base station cell-specifically informs all terminals in a cell of one value of ⁇ 0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ⁇ through 3-bit information.
  • PL is a path-loss value calculated by the terminal, and is calculated through reception power of a cell-specific reference signal (CRS) of a downlink channel transmitted by the base station. More specifically, the base station transmits referenceSignalPower and filtering coefficient to the terminal through UE-specific or cell-specific RRC signaling, and the terminal calculates path-loss as below based thereon.
  • PL referenceSignalPower ⁇ higher layer filtered RSRP Equation 1-b
  • ⁇ TF (i) is a value related to MCS, and is configured as below.
  • K S is a higher layer parameter, a value given by deltaMCS-Enabled, and bits per resource element (BPRE) may be calculated as below.
  • C indicates the number of code blocks
  • K r indicates a size of a code block “r”
  • O CQI indicates the number of CQI/PMI bits including CRC
  • N RE indicates the number of resource elements.
  • f(i) is a parameter for performing power control by a closed-loop, and may vary depending on whether accumulation-based power control is performed or absolute value-based power control is performed.
  • f(i) f(i ⁇ 1)+ ⁇ PUSCH (i ⁇ K PUSCH ). That is, in an i-th subframe, as f(i), a value obtained by accumulating a f(i ⁇ 1) value used in a previous subframe (that is, i ⁇ 1-th subframe) and ⁇ PUSCH value transmitted to the terminal through DCI via a physical downlink control channel (PDCCH) in a i ⁇ K PUSCH -th subframe is used.
  • PDCCH physical downlink control channel
  • K PUSCH 4
  • K PUSCH may have different values according to DL/UL configuration.
  • f(i) ⁇ PUSCH (i ⁇ K PUSCH ). That is, in an i-th subframe, as f(i), a value transmitted to the terminal through DCI via a physical downlink control channel (PDCCH) in a i ⁇ K PUSCH -th subframe is directly used without accumulation.
  • PDCCH physical downlink control channel
  • K PUSCH 4
  • K PUSCH may have different values according to DL/UL configuration as in Table 1-a.
  • the ⁇ PUSCH values used for the accumulation-based power control and the absolute value-based power control may vary depending on a DCI format. For example, in the case of DCI formats 0, 3, and 4, a value of Table 1-b is used, and in the case of DCI format 3A, a value of Table 1-c is used.
  • TPC Command Field in Accumulated Absolute ⁇ PUSCH [dB]
  • DCI format 0/3/4 ⁇ PUSCH [dB] only DCI format 0/4 0 ⁇ 1 ⁇ 4 1 0 ⁇ 1 2 1 1 3 3 4
  • TPC Command Field in DCI format 3A Accumulated ⁇ PUSCH [dB] 0 ⁇ 1 1 1
  • a transmission power control for an uplink control channel (physical uplink control channel (PUCCH)) of an LTE cellular communication system is as represented by Equation 1-e below.
  • P PUSCH ⁇ ( i ) min ⁇ ⁇ P CMAX ⁇ ( i ) , P 0 ⁇ _ ⁇ PUCCH + PL + h ⁇ ( n CQI , n HARQ , n SR ) + ⁇ F ⁇ _ ⁇ PUCCH ⁇ ( F ) + ⁇ TxD ⁇ ( F ′ ) + g ⁇ ( i ) ⁇ ⁇ [ dBm ] Equation ⁇ ⁇ 1 ⁇ - ⁇ e
  • Equation 1-e represents P PUCCH (i), transmission power of the PUCCH which is a physical channel for uplink control information transmission in an i-th subframe of the terminal.
  • P 0_PUCCH is a parameter configured by P 0_NOMINAL_PUCCH +P 0_UE_PUCCH , and is a value informed by the base station to the terminal through higher layer signaling (RRC signaling).
  • RRC signaling higher layer signaling
  • P 0_NOMINAL_PUCCH is a cell-specific value configured by 8-bit information and has a range of [ ⁇ 126, 24] dB.
  • P 0_UE_PUCCH is a cell-specific value configured by 4-bit information and has a range of [ ⁇ 8, 7] dB.
  • the cell-specific value is transmitted by the base station through cell-specific RRC signaling (system information block (SIB), and a user equipment (UE)-specific value is transmitted by the base station to the terminal through dedicated RRC signaling.
  • SIB system information block
  • UE user equipment
  • PL which is a path-loss value calculated by the terminal is calculated through reception power of a cell-specific reference signal (CRS) of a downlink channel transmitted by the base station, similarly to the transmission power control of the PUSCH. More specifically, the base station transmits referenceSignalPower and filtering coefficient to the terminal through UE-specific or cell-specific RRC signaling, and the terminal calculates path-loss as Equation 1-b above based thereon.
  • CRS cell-specific reference signal
  • ⁇ F_PUCCH (F) is transmitted to the terminal through higher layer signaling (cell-specific or UE-specific RRC signaling), and is a value varying according to a format of the PUCCH and has a relative value based on PUCCH format 1a (1-bit HARQ-ACK/NACK transmission).
  • the ⁇ F_PUCCH (F) value is configured as shown in Table 1-d.
  • ⁇ F — PUCCH (F) Values PUCCH Format Parameters
  • higher layer signaling cell-specific or UE-specific RRC signaling
  • SFBC space frequency block code
  • the ⁇ T ⁇ D (F′) value is configured as shown in Table 1-e.
  • h ⁇ ( n CQI , n HARQ , n SR ) ⁇ 10 ⁇ log 10 ⁇ ( n CQI 4 ) if ⁇ ⁇ n CQI ⁇ 4 0 otherwise Equation ⁇ ⁇ 1 ⁇ - ⁇ f
  • h(n CQI , n HARQ , n SR ) is as follows.
  • h ⁇ ( n CQI , n HARQ , n SR ) ⁇ 10 ⁇ log 10 ⁇ ( n CQI + n HARQ 4 ) if ⁇ ⁇ n CQI + n HARQ ⁇ 4 0 otherwise Equation ⁇ ⁇ 1 ⁇ - ⁇ g
  • h(n CQI , n HARQ , n SR ) is as follows.
  • h ⁇ ( n CQI , n HARQ , n SR ) ⁇ n HARQ + n SR - 1 3 if ⁇ ⁇ PUCCH ⁇ ⁇ transmission ⁇ ⁇ on ⁇ ⁇ two ⁇ ⁇ antenna ⁇ ⁇ ports ⁇ ⁇ or ⁇ ⁇ n HARQ + n SR ⁇ 11 ⁇ ⁇ bits n HARQ + n SR - 1 2 otherwise Equation ⁇ ⁇ 1 ⁇ - ⁇ h
  • g(i) a value obtained by accumulating a g(i ⁇ 1) value used in a previous subframe (that is, i ⁇ 1-th subframe) and a ⁇ PUCCH value transmitted to the terminal through DCI via a physical downlink control channel (PDCCH) in a i ⁇ k m -th subframe is used.
  • PDCCH physical downlink control channel
  • M, k 0 may have different values according to DL/UL configuration as in Table 1-f.
  • the ⁇ PUCCH value may vary according to the DCI format, and in the case of DCI format 1A/1B/1D/1/2A/2B/2C/2/3, the same value as the accumulated ⁇ PUSCH in Table 1-b is used, and in the case of DCI format 3A, as the ⁇ PUCCH value, the same value as the ⁇ PUSCH value used in Table 1-c is used.
  • a main purpose of controlling uplink transmission power of the terminal is to minimize an amount of interference caused to a neighboring cell and minimize power consumption of the terminal. Further, it is to make a transmission signal of the terminal to be in a dynamic range of automatic gain control of a reception end of the base station by constantly maintaining a strength of a reception signal received by the base station regardless of a position of the terminal in a cell.
  • Such a transmission power control may be applied in the beamforming system for the same purpose.
  • the interference caused to a neighboring cell and the strength of a reception signal received by the base station may vary depending on what beam the terminal use for transmission. For example, a specific terminal may use an omni-antenna not supporting beamforming for transmission.
  • Another terminal with the small number of antenna elements may transmit uplink data and control information using a wide beam. Further, another terminal with the large number of antenna elements may transmit uplink data and control information using a narrow beam. Therefore, there is a need to use different transmission power control parameters depending on the transmission beam of the terminal.
  • FIG. 1A is a diagram illustrating an example for transmission of a parameter for controlling transmission power of a base station according to an embodiment of the present disclosure.
  • the base station may not know capability of the terminal before capability negotiation with the terminal, thus may transmit a default transmission power parameter that can be commonly used by all terminals accessing in a cell regardless of their capability ( 1 a - 10 ).
  • P 0_PUSCH is configured of a cell-specific parameter, P 0_NOMINAL_PUSCH , and a UE-specific parameter, P 0_UE_PUSCH .
  • P 0_PUCCH is also configured of a cell-specific parameter, P 0_NOMINAL_PUCCH , and a UE-specific parameter, P 0_UE_PUCCH .
  • P 0_NOMINAL_PUSCH and P 0_NOMINAL_PUCCH which are cell-specific parameters may be transmitted to the terminal through a control channel broadcasted by the base station like a master information block (MIB) or a system information block (SIB).
  • MIB master information block
  • SIB system information block
  • P 0_NOMINAL_PUSCH and P 0_NOMINAL_PUCCH may be transmitted through common downlink control information (DCI) configuring a common search space.
  • DCI downlink control information
  • the base station may configure one or two of default values through a broadcast channel such as the MIB, the SIB, or the common DCI.
  • the base station may configure one or more of a default value for a terminal using an omni-antenna, a default value for a terminal using a wide beam, and a default value for a terminal using a narrow beam.
  • the terminal may continuously use the default values until the base station transmits an additional instruction as in FIG. 1A .
  • Such an additional instruction (update of P 0_UE_PUSCH and P 0_UE_PUCCH values) of the base station may be transmitted through UE-specific RRC signaling or through L1-signaling (PDCCH) after RRC connection setup ( 1 a - 30 ) (or after performing a random access process ( 1 a - 30 )) ( 1 a - 40 ).
  • PDCCH L1-signaling
  • the base station may perform transmission while including the updated P 0_UE_PUSCH and P 0_UE_PUCCH values or a value indicating a difference (offset value) from the default value in the PDCCH transmitted for each UE through a dedicated PDCCH.
  • the base station may transmit the updated P 0_UE_PUSCH and P 0_UE_PUCCH values or the offset value to two or more UEs through a separate DCI for the power control.
  • P 0_PUSCH and P 0_PUCCH values may be used regardless of cell-specific and UE-specific parameters. Such values may be dedicatedly transmitted to each terminal through UE-specific RRC signaling or cell-specifically transmitted. Therefore, default P 0_PUSCH and P 0_PUCCH values that may be used by the terminal for transmission of uplink data and control information before capability negotiation between the base station and the terminal are required. Such default values may be embedded in the base station and the terminal as mentioned above or configured by the base station through the MIB, the SIB, or the common DCI.
  • the terminal may continuously use the default values until the base station transmits an additional instruction ( 1 a - 40 ) as in FIG. 1A .
  • Such an additional instruction (update of P 0_PUSCH and P 0_PUCCH values) of the base station may be transmitted through UE-specific RRC signaling or through L1-signaling (PDCCH) after RRC connection setup ( 1 a - 30 ) (or after performing a random access process ( 1 a - 20 )).
  • the terminal may determine transmission power based on a default transmission power parameter.
  • the terminal may determine uplink PUSCH transmission power and/or uplink PUCCH transmission power based on a default transmission power parameter.
  • the default transmission power parameter may be used by the terminal to determine transmission power before receiving a terminal-specific transmission power parameter. If the terminal receives the terminal-specific transmission power parameter, the terminal may determine uplink transmission power of the terminal using the terminal-specific transmission power parameter.
  • the terminal may determine uplink PUSCH transmission power and/or uplink PUCCH transmission power based on the terminal-specific transmission power parameter.
  • the terminal-specific transmission power parameter may have priority higher than that of the default transmission power parameter. Therefore, if the terminal receives both of the default transmission power parameter, and the terminal-specific transmission power parameter, the terminal-specific transmission power parameter may take precedence in determining transmission power.
  • the terminal may determine, check, calculate, and obtain transmission power based on a transmission power parameter, and transmit a PUCCH or PUSCH based on the obtained transmission power value.
  • FIG. 1B is a diagram illustrating an example for transmission of a parameter for controlling transmission power of a terminal in a random access process according to an embodiment of the present disclosure.
  • FIG. 1B may correspond to operation 1 a - 20 in FIG. 1A .
  • the terminal transmits a random access preamble, and at this time, transmission power parameters used for the transmission of the random access preamble may be transmitted from the base station through the MIB, the SIB, or the common DCI.
  • the base station transmits preambleInitialReceivedTargetPower and powerRampingStep parameters through the SIB
  • preambleInitialReceivedTargetPower is a value between ⁇ 120, ⁇ 118, ⁇ 116, . . . , ⁇ 92, ⁇ 90 ⁇ dBm
  • powerRampingStep is a value between ⁇ 0, 2, 4, 6 ⁇ dB.
  • the transmission power for the transmission of the random access preamble of the terminal is calculated as below.
  • the terminal sets the preambleInitialReceivedTargetPower parameter received through the SIB as PREAMBLE_RECEIVED_TARGET_POWER,
  • the base station receives the random access preamble transmitted by the terminal, and in operation 1 b - 20 , the base station transmits a random access response (RAR).
  • the RAR may include information for transmitting MSG3.
  • the terminal receiving the RAR transmits the MSG3 to the base station in operation 1 b - 30 .
  • the base station receiving the MSG3 may transmit MSG3 to the terminal in operation 1 b - 40 .
  • the terminal monitors the PDCCH to receive random access response (RAR) for a predetermined time after transmitting the random access preamble.
  • RAR random access response
  • Information on how long the terminal needs to monitor the PDCCH for the reception of the RAR is transmitted by the base station through ra-ResponseWindowSize parameter of the SIB. If the terminal fails to receive the RAR for ra-ResponseWindowSize time, the terminal retransmits the random access preamble. At this time, the transmission power of the random access preamble retransmitted by the terminal may be increased by powerRampingStep [dB] as compared to the transmission power used for initial random access preamble transmission using the above-mentioned powerRampingStep parameter.
  • the terminal may perform the following operations.
  • Option 1 may be used, in the case of “01”, Option 2 may be used, and in the case of “10”, Option 3 may be used.
  • FIG. 1C is a diagram illustrating an example of an operation of a terminal for controlling transmission power of the terminal in a random access process according to an embodiment of the present disclosure. More specifically, FIG. 1C is a diagram for detailed description of the above-mentioned Option 2.
  • the terminal receives random access parameters from the base station through the MIB, the SIB, or the common DCI.
  • the random access parameter may include a random access preamble sequence type, a time/frequency resource for random access preamble transmission, target reception power of the random access preamble, a size of power ramping step for increase in transmission power to be performed at the time of random access retransmission, a size of a RAR reception window indicating RAR monitoring time, the maximum number of retransmission of the random access preamble, and the like.
  • the terminal receiving the random access parameter transmits the random access preamble through Equation 1-j. (operation 1 c - 10 ).
  • the terminal checks whether the RAR is received in the RAR reception window. If the RAR is received, the terminal proceeds to operation 1 c - 20 , and if the RAR is not received, the terminal proceeds to operation 1 c - 25 .
  • the terminal may transmit Msg3.
  • a transmission power parameter for the Msg3 transmission may be informed by the base station to the terminal through the RAR.
  • the terminal increases random access preamble transmission power and retransmits the random access preamble.
  • an increase amount of the random access preamble may be configured by the base station through the SIB or the common DCI (size of power ramping step), if the size of the power ramping step is configured to be 0 dB, the transmission power of the random access preamble is not increased.
  • the terminal performs retransmission while increasing the transmission power of the preamble until the number of retransmission of the random access preamble reaches the maximum (operation 1 c - 30 ).
  • operation 1 c - 35 the terminal checks whether the number of retransmission reaches the maximum. If the number of retransmission reaches the maximum, the terminal proceeds to operation 1 c - 40 , and if not, may proceed to operation 1 c - 15 .
  • the terminal abandons the random access process and re-performs a cell-selection process.
  • the cell-selection process means a process in which the terminal detects a synchronization signal transmitted from each cell and accesses a beam of the base station transmitting a synchronization signal having the greatest reception signal strength. If the number of retransmission did not reach the maximum number of retransmission, the terminal, the terminal may proceed to operation 1 c - 15 , and may continuously perform operations subsequent to operation 1 c - 15 .
  • FIG. 1D is a diagram illustrating another example of an operation of a terminal for controlling transmission power of the terminal in a random access process according to an embodiment of the present disclosure. More specifically, FIG. 1D is a diagram for detailed description of the above-mentioned Option 1.
  • the terminal receives random access parameters from the base station through the MIB, the SIB, or the common DCI.
  • the random access parameter may include a random access preamble sequence type, a time/frequency resource for random access preamble transmission, target reception power of the random access preamble, information on a beam to be used at the time of random access retransmission, a size of a RAR reception window indicating RAR monitoring time, the maximum number of retransmission of the random access preamble, and the like.
  • the information on the beam to be used at the time of random access retransmission the following may be considered.
  • a value indicating a difference in reception signal strength of the beam [x dB] it is assumed that if a synchronization signal having the greatest reception signal strength is S1, a synchronization signal having the next greatest reception signal strength is S2, and a synchronization signal having the third greatest reception signal strength is S3 (that is, S1>S2>S3>S4> . . . ), based on a strength of a synchronization signal detected by the terminal through a synchronization signal beamformed and transmitted.
  • [x dB] is used to select a preamble to be retransmitted by the terminal, and in the case in which S1 ⁇ S2 ⁇ [x dB], and S1 ⁇ S3>[x dB], the terminal use a beam in which the S1 is transmitted for initial transmission of the random access preamble. Further, a beam in which S3 is transmitted may be used for first retransmission of the random access preamble, rather than the beam in which the S2 is transmitted.
  • the terminal may use a beam in which S5 is transmitted for second retransmission of the random access preamble, rather than a beam in which S4 is transmitted. If the beam is changed, the same value of transmission power used for transmission of the random access preamble as transmission power used for transmission of the random access preamble in the previous beam may be used.
  • the terminal receiving the random access parameter transmits the random access preamble in a specific beam (beam detected through a synchronization signal) through Equation 1-j (operation 1 d - 10 ).
  • the terminal checks whether the RAR is received in the RAR reception window. If the RAR is received, the terminal proceeds to operation 1 d - 20 , and if the RAR is not received, the terminal proceeds to operation 1 d - 25 .
  • the terminal may transmit Msg3.
  • a beam for the Msg3 transmission the same beam as the beam used for random access preamble transmission is used, and a transmission power parameter at this time may be informed by the base station to the terminal through the RAR.
  • the terminal If the terminal did not receive the RAR in the RAR reception window, in operation 1 d - 25 , the terminal changes the beam for random access preamble transmission and retransmits the random access preamble using the changed beam.
  • the terminal performs retransmission while changing the beam of the preamble until the number of retransmission of the random access preamble reaches the maximum ( 1 d - 30 ).
  • operation 1 d - 35 the terminal checks whether the number of retransmission reaches the maximum. If the number of retransmission reaches the maximum, the terminal proceeds to operation 1 c - 40 , and if not, may proceed to operation 1 d - 15 .
  • the terminal abandons the random access process and re-performs a cell-selection process.
  • the cell-selection process means a process in which the terminal detects a synchronization signal transmitted from each cell and accesses a beam of the base station transmitting a synchronization signal having the greatest reception signal strength. If the number of retransmission did not reach the maximum number of retransmission, the terminal, the terminal may proceed to operation 1 d - 15 , and may continuously perform operations subsequent to operation 1 d - 15 .
  • FIG. 1E is a diagram illustrating another example of an operation of a terminal for controlling transmission power of the terminal in a random access process according to an embodiment of the present disclosure. More specifically, FIG. 1D is a diagram for detailed description of the above-mentioned Option 1.
  • the terminal receives random access parameters from the base station through the MIB, the SIB, or the common DCI.
  • the random access parameter may include a random access preamble sequence type, a time/frequency resource for random access preamble transmission, target reception power of the random access preamble, a size of power ramping step for increase in transmission power to be performed at the time of random access retransmission, information on a beam to be used at the time of random access retransmission, a size of a RAR reception window indicating RAR monitoring time, the maximum number of retransmission of the random access preamble, and the like.
  • the information on the beam to be used at the time of random access retransmission the following may be considered.
  • a value indicating a difference in reception signal strength of the beam [x dB] it is assumed that if a synchronization signal having the greatest reception signal strength is S1, a synchronization signal having the next greatest reception signal strength is S2, and a synchronization signal having the third greatest reception signal strength is S3 (that is, S1>S2>S3>S4> . . . ), based on a strength of a synchronization signal detected by the terminal through a synchronization signal beamformed and transmitted.
  • [x dB] is used to select a preamble to be retransmitted by the terminal, and in the case in which S1 ⁇ S2 ⁇ [x dB], and S1 ⁇ S3>[x dB], the terminal use a beam in which the S1 is transmitted for initial transmission of the random access preamble. Further, a beam in which S3 is transmitted may be used for first retransmission of the random access preamble, rather than the beam in which the S2 is transmitted.
  • the terminal may use a beam in which S5 is transmitted for second retransmission of the random access preamble, rather than a beam in which S4 is transmitted.
  • the terminal receiving the random access parameter transmits the random access preamble in a specific beam (beam detected through a synchronization signal) through Equation 1-j (operation 1 e - 10 ).
  • the terminal checks whether the RAR is received in the RAR reception window. If the RAR is received, the terminal proceeds to operation 1 e - 20 , and if the RAR is not received, the terminal proceeds to operation 1 e - 25 .
  • the terminal may transmit Msg3.
  • a beam for the Msg3 transmission the same beam as the beam used for random access preamble transmission is used, and a transmission power parameter at this time may be informed by the base station to the terminal through the RAR.
  • the terminal may increase random access preamble transmission power and retransmit the random access preamble in the same beam as the beam used for initial transmission of the random access preamble.
  • the terminal performs retransmission while increasing the transmission power of the preamble until the number of retransmission of the random access preamble reaches the maximum (operation 1 e - 30 ).
  • the terminal checks whether the number of retransmission reaches the maximum. If the number of retransmission reaches the maximum, the terminal proceeds to operation 1 e - 40 , and if not, may proceed to operation 1 e - 15 .
  • the terminal changes the beam for random access preamble transmission and in operation 1 e - 45 , retransmits the random access preamble using the changed beam.
  • the terminal checks whether the RAR is received in the RAR reception window. If the RAR is received, the terminal proceeds to operation 1 e - 20 , and if the RAR is not received, the terminal proceeds to operation 1 e - 55 .
  • the cell-selection process means a process in which the terminal detects a synchronization signal transmitted from each cell and accesses a beam of the base station transmitting a synchronization signal having the greatest reception signal strength.
  • RAR reception window (T1) for power ramping and RAR reception window (T2) may be the same as each other or different from each other.
  • the random access process is abandoned, and the cell-selection process may be re-performed.
  • the maximum number of retransmission at this time may be the same as or different from the maximum number of retransmission for power ramping.
  • a sequence of preamble transmission power and beam change may be applied differently from FIG. 1E .
  • FIG. 1E a case in which the transmission power is increased to transmit the random access preamble, and if the RAR is not received, the beam is changed is described. However, the beam change may be first performed, and then if the RAR is not received, the transmission power for the random access preamble may be increased.
  • FIGS. 1F and 1G are diagrams illustrating examples of parameters for controlling transmission power of a terminal after RRC connection setup according to an embodiment of the present disclosure.
  • Such parameters may be transmitted to each terminal through UE-specific dedicated RRC signaling, and a cell using a wide beam and a cell using a narrow may use different parameters.
  • a wide beam may be operated at a specific moment and a narrow beam may be operated at another moment in the same cell depending on an operation of the base station. More specifically, in order to decrease initial beam searching time of the terminal, the synchronization signal and broadcast channel may be operated using a wide beam.
  • the base station may transmit UE-specific data and control information by forming a narrow beam based on the wide beam detected by the terminal.
  • the base station may configure all of P0 and alpha value for the wide beam, and P0 and alpha value for the narrow beam.
  • P 0 is used by being divided into two values, P0-Nominal and P0-UE, but P 0 may also be used as signal P 0 value.
  • P 0 may be used in forms of P0-PUSCH-WideBeam and P0-PUSCH-NarrowBeam.
  • P0-NominalPUCCH-WideBeam P0-NominalPUCCH-NarrowBeam
  • P0-UE-PUCCH-WideBeam P0-UE-PUCCH-NarrowBeam
  • Alpha-Widebeam Alpha-Narrowbeam
  • the terminal may use a wide beam or a narrow beam may depend on capability of the terminal. For example, terminals that may have a large number of antenna arrays may use a narrow beam. Therefore, such RRC signaling may be applied after capability negotiation between the base station and the terminal.
  • beam reciprocity from the point of view of the base station and beam reciprocity from the point of view of the terminal may be considered, respectively or simultaneously.
  • the beam reciprocity from the point of view of the base station means a case in which the transmission beam of the base station and the reception beam of the base station are the same as each other
  • the beam reciprocity from the point of view of the terminal means a case in which the transmission beam of the terminal and the reception beam of the terminal are the same as each other.
  • the case in which the reception beam of the base station and the transmission beam of the base station (or the transmission beam of the terminal and the reception beam of the terminal) are the same as each other means that beam gains or beam directions of the reception beam and the transmission beam are the same as each other.
  • the case in which beam reciprocity is not established from the point of view of the base station means that the beam gains or beam directions of the reception beam of the base station and the transmission beam of the base station are different from each other.
  • the different beam gains mean that gain a difference between the reception beam and the transmission beam deviates from a certain range.
  • the different beam directions mean that a difference between the reception beam direction and the transmission beam direction deviates from a certain range.
  • the case in which beam reciprocity is not established from the point of view of the terminal means that a difference in the beam gains or beam directions between the reception beam and the transmission beam deviates from a certain range.
  • the base station may transmit P0 values for N different beams (P0 value having different values for each beam) like ⁇ P01, P02, . . . , P0N ⁇ to the terminal through RRC signaling.
  • the base station may transmit P0 values for M different transmission beam—reception beam pairs (different P0 values for each beam pair) like ⁇ P01′, P02′, . . . , P0M′ ⁇ to the terminal through RRC signaling.
  • the base station determines whether beam reciprocity is established and if the beam reciprocity is established, transmits ⁇ P01, P02, . . . , P0N ⁇ through the RRC signaling, and if the beam reciprocity is not established, may transmit ⁇ P01′, P02′, . . . , P0M′ ⁇ through the RRC signaling.
  • the base station does not determine whether beam reciprocity is established and P0 values ( ⁇ P01, P02, . . . , P0N ⁇ ) for the case in which the beam reciprocity is established or P0 values ( ⁇ P01′, P02′, . . . , P0M′ ⁇ ) for all combinations of transmission beam—reception beam to the terminal through the RRC signaling.
  • BeamReciprocity_enabled uses N values configured of ⁇ P01, P02, . . . , P0N ⁇ .
  • the terminal receiving BeamReciprocity_disabled uses M values configured of ⁇ P01′, P02′, . . . , P0M′ ⁇ .
  • the base station may signal a P0 value as a reference through RRC and then signal an offset value with an actually used beam from the reference through RRC or DCI. More specifically, if assuming the P0 value (P0 value for each beam) as a reference as ⁇ P01, P02, . . . , P0N ⁇ , information on which P0 will be used (e.g., P02) and offset information on how much offset value needs to be applied based on P02 may be transmitted.
  • the P0 value as a reference may be signaled through the RRC, and the offset value may also be signaled through the RRC (e.g., ⁇ offset_1, offset_2, . . . , offset_K ⁇ ). Further, which offset value needs to be actually used may be indicated through the DCI.
  • path-loss is calculated by the terminal as in Equation 1b.
  • PUSCH uplink data channel
  • PUCCH uplink control channel
  • the transmission beam and the reception beam may form beam widths different from each other.
  • a gain difference between the transmission beam and the reception beam may be generated since the number of panels of the antenna generating the transmission beam and the number of panels of the antenna forming the reception beam are different from each other. More specifically, the number of transmission beam panels of the terminal may be smaller than the number of reception beam panels of the terminal. Accordingly, a width of the transmission beam of the terminal may be larger than a width of the reception beam of the terminal. Similarly, the number of transmission beam panels of the base station may be different from the number of reception beam panels of the base station.
  • a value of path-loss calculated by the terminal through downlink and a value of path-loss for which the terminal suffers when actually transmitting data and control information through uplink may be different from each other.
  • the downlink path-loss estimated by the terminal may include transmission beam gain of the base station and reception beam gain of the terminal. Further, the data and control information transmitted by the terminal through uplink are received by the base station while the transmission beam gain of the terminal and the reception beam gain of the base station are combined with the path-loss.
  • the base station may not predict transmission power actually transmitted by the terminal. For example, if GDL ⁇ GUL, downlink path-loss+GDL>uplink path-loss+GUL (in the case in which downlink path-loss is the same as uplink path-loss).
  • the terminal transmits uplink data and control information with larger power than actually required transmission power. This may cause unnecessary power consumption and additional interference to a neighboring cell.
  • GDL>GUL downlink path-loss+GDL ⁇ uplink path-loss+GUL (in the case in which downlink path-loss is the same as uplink path-loss).
  • the terminal performs transmission with smaller power than actually required transmission power. This may not satisfy reception target SINR in a serving base station, thus uplink data and control information reception performance may deteriorate. Accordingly, a beam gain difference depending on a transmission/reception beam pattern needs to be reflected.
  • the terminal may transmit power headroom report (PHR) to the base station through an MAC control element and an MAC message.
  • PHR power headroom report
  • the PHR information is configured of a difference between maximum transmission power that may be transmitted by the terminal and actual transmission power transmitted by the terminal.
  • the base station determines whether the terminal may additionally increase transmission power (if the PHR value is a positive number) or whether the terminal needs to decrease transmission power (if the PHR value is a negative number) based on the PHR information transmitted by the terminal. If the PHR value is a positive number, the base station may increase resources at the time of next uplink transmission of the terminal transmitting the PHR, and if the PHR value is a negative number, the base station may decrease resources at the time of next uplink transmission of the terminal transmitting the PHR.
  • the terminal may transmit uplink data and control information with transmission power larger than transmission power that the terminal actually needs to transmit. This may cause unnecessary power consumption and additional interference to a neighboring cell. Further, due to the difference between GDL and GUL mentioned above, the terminal may transmit uplink data and control information with transmission power smaller than transmission power that the terminal actually needs to transmit. This may not satisfy reception target SINR in a serving base station, thus uplink data and control information reception performance may deteriorate. Therefore, there is a need to decrease errors generated due to the GDL and GUL.
  • the base station may inform the terminal of transmission beam gain and reception beam gain of the base station at the time of capability negotiation between the base station and the terminal.
  • the terminal may reflect transmission/reception beam gain of the base station transmitted from the base station and transmission/reception beam gain of the terminal measured by the terminal itself in downlink path-loss calculation for the transmission power control.
  • the terminal may include information on transmission beam gain and reception beam gain of the terminal in PHR when transmitting the PHR to the base station.
  • the terminal may recalculate PHR through transmission/reception beam gain of the terminal transmitted from the terminal and transmission/reception beam gain of the base station measured by the base station itself.
  • the base station may transmit transmission beam gain of the base station to the terminal through RRC signaling.
  • referenceSignalPower in Equation 1-b may be a value including transmission power of the base station and transmission beam gain of the base station. That is, referenceSignalPower configured by the base station through RRC is a value configured by transmission power of the base station+transmission beam gain of the base station.
  • RSRP measured by the terminal is reception power in which downlink path-loss and reception beam gain of the terminal are reflected. Accordingly, transmission beam gain of the base station and reception beam gain of the terminal may be naturally reflected in downlink path-loss calculated by the terminal.
  • the terminal may transmit transmission beam gain of the terminal to the base station, and the transmission may be made at the time of capability negotiation between the base station and the terminal, or may be made through MAC control element/MAC message for transmitting the PHR or a separate MAC control element/MAC message.
  • the base station may appropriately use a P0 value. More specifically, P0_Nominal_PUSCH/P0_Nominal_PUCCH is a cell-specific value, and may appropriately reflect a difference in transmission beam and reception beam gain of the base station. Further, P0_UE_PUSCH/P0_UE_PUCCH may appropriately reflect a difference in transmission beam and reception beam gain of the terminal.
  • the base station may acquire information on transmission beam and reception beam gain of the terminal through capability negotiation between the base station and the terminal or the base station may acquire information on transmission beam and reception beam gain of the terminal through PHR transmission of the terminal
  • the base station may determine P0_Nominal_PUSCH/P0_Nominal_PUCCH value or P0_UE_PUSCH/P0_UE_PUCCH value by using transmission beam gain and reception beam gain of the base station measured by the base station itself.
  • the base station may appropriately use a closed-loop power control value. More specifically, in Equation 1-a, f(i) is a value that may be dynamically controlled by the base station through the PDCCH, and may appropriately reflect a difference in transmission beam and reception beam gain of the base station.
  • the terminal may calculate downlink PL in which the transmission beam of the base station and the reception beam of the terminal (that is, GDL) are reflected to set a transmission power value of the terminal.
  • the base station may predict uplink PL in which the transmission beam of the terminal and the reception beam of the base station (that is, GUL) are reflected by using an uplink data channel, uplink control channel, or uplink control signal (e.g., sounding reference signal, demodulation reference signal, or the like) of the terminal.
  • the base station may infer a difference between the downlink PL calculated by the terminal and the uplink PL predicted by the base station using PHR information reported by the terminal and the uplink PL predicted by the base station itself (that is, a difference between the downlink PL and the uplink PL, offset).
  • the base station may perform dynamic configuration through the PDCCH by reflecting the offset value in f(i) (adjusting ⁇ value included in f(i)).
  • a large number of beams may exist according to a combination of transmission beams of the base station and reception beams of the terminal. For example, if the number of transmission beams of the base station is 100, and the number of reception beams of the terminal is 2, there may be a total of 200 beam pairs.
  • the terminal In order to perform transmission power control for each of different beams, the terminal needs to perform path-loss calculation for each beam. However, in the case of performing the path-loss calculation for too many beams, a required amount of memory of the terminal is increased, which is not preferable. On the contrary, in the case of performing the path-loss calculation for too few beams, there may be limitation in beam operation of the base station.
  • a terminal-A signal strength for three beam (or beam pair) of a beam 1 , a beam 12 , and a beam 33 may be greater than other beams, and uplink data and control information may be transmitted using the beams. Therefore, although path-loss for the beams is stored, the terminal may determine that a large number of users gather around the beams or that an amount of interference caused to a neighboring cell may increase when the beams are used. In this case, the terminal-A may not perform transmission in the corresponding subframe (the base station scheduler does not allocate a beam). Accordingly, latency may occur.
  • the base station may instruct the terminal-A to transmit uplink data and control information using another beam (e.g., beam 102 or beam pair 102 ), although it is not a preferred beam of the terminal-A.
  • another beam e.g., beam 102 or beam pair 102
  • the transmission power control may not be performed.
  • the following operation may be considered.
  • FIG. 1H is a diagram illustrating an operation of a base station and a terminal related to a change of an uplink transmission beam of the terminal based on power headroom reporting (PHR) according to an embodiment of the present disclosure.
  • PHR power headroom reporting
  • the base station may transmit the number of beams to be reported by the terminal to the terminal through RRC signaling, MAC control element/MAC message, or DCI. For example, if the number of beams (or beam pairs) is set to be N, the terminal reports a beam index and reception signal strength of a beam for each of N beams (hereinafter, referred to as beam information) to the base station through uplink. Such a beam information may be periodically transmitted by the terminal or aperiodically transmitted by instruction of the base station. Meanwhile, the terminal transmits PHR to the base station, and the PHR transmission may be made when a specific condition is satisfied (event triggered) or may be periodically made.
  • the PHR information may be transmitted through the MAC control element or MAC message, and configured of a maximum transmission power value of the terminal and a transmission power value actually used by the terminal.
  • the base station may transmit instruction to change an uplink transmission beam of the terminal using the PHR information transmitted from the terminal.
  • the three beams may be a beam (assumed as being beam A) having the greatest signal strength, a beam (assumed as being beam B) having a signal strength difference of x dB based on the beam A, and a beam having a signal strength difference of x dB based on beam B.
  • a reason of having a difference of x dB is that a path-loss difference may not be large in the case of different beams having the same signal strength. Therefore, the terminal need not store multiple similar path-loss values.
  • the x dB value may be transmitted through the RRC signaling, MAC control element/MAC message, or DCI.
  • the number of beams for which the terminal needs to perform path-loss measurement may be indicated, and a beam index or beam index set for measurement may be indicated as well. This may also be referred to as information on the beam for path-loss measurement.
  • the three beams of which path-loss needs to be calculated by the terminal may be a beam (assumed as being beam A) having the greatest signal strength, and beams (assumed as being beam B and beam C) having a signal strength difference of y dB or less based on the beam A,
  • beam A the greatest signal strength
  • beam B and beam C beams (assumed as being beam B and beam C) having a signal strength difference of y dB or less based on the beam A
  • a reason of limiting the signal strength difference to y dB or less is that if the strength difference of the beam is too large, there is no possibility of using the corresponding beam. Therefore, the terminal need not store multiple similar path-loss values.
  • the y dB value may be transmitted through the RRC signaling, MAC control element/MAC message, or DCI.
  • the base station may transmit “Number of Beams” parameter that informs for how many beams beam information is to be reported, to the terminal through the RRC signaling, MAC control element/MAC message, or DCI.
  • the base station may transmit a threshold for beam information reporting to the terminal together with the “Number of Beams” parameter through the RRC signaling, MAC control element/MAC message, or DCI.
  • the base station may configure the threshold value so that a beam having reception signal strength of the threshold value or less is not reported.
  • the base station transmits PHR information to the terminal.
  • the PHR information may include information on the number of beams in which the PHR is to be transmitted. If the information on the number of beams is not separately included in the PHR information, the “Number of Beams” parameter used in operation 1 h - 10 , may be used. Alternatively, the number of beams included in the PHR information may be different from the “Number of Beams” parameter used in operation 1 h - 10 . Two thresholds (threshold- 1 and threshold- 2 , threshold- 1 ⁇ threshold- 2 ) may be included.
  • the terminal receiving the PHR information determines whether a difference between reception signal strength of a previous serving beam (beam used for uplink data and control information transmission in previous subframe n ⁇ k) and reception signal strength of a current serving beam (beam used for uplink data and control information transmission in current subframe n) is the threshold- 1 or more. If the difference in the reception signal strength between the previous serving beam and the current serving beam is the threshold- 1 or more, but is less than the threshold- 2 , the terminal may perform transmission by including serving beam information in the PHR. At this time, the serving beam information may include an index of a serving beam and reception signal strength of the serving beam.
  • the terminal may not transmit the PHR. If the difference in the reception signal strength between the previous serving beam and the current serving beam is not the threshold- 1 or more, the terminal may not transmit the PHR. If the difference in the reception signal strength between the previous serving beam and the current serving beam is the threshold- 2 or more, the terminal may perform transmission by including serving beam and candidate beam information in the PHR.
  • Candidate beams mean beams that are not a serving beam but may become a serving beam. For example, if it is assumed that the number of beams configured in the PHR information transmitted by the base station to the terminal or the “Number of Beams” parameter is N, N ⁇ 1 beams may be candidate beams except from the serving beam.
  • the base station may configure a single threshold in the PHR information.
  • the terminal receiving this determines whether a difference between the previous serving beam and the current serving beam is the corresponding threshold or more. If the difference between the previous serving beam and the current serving beam is the threshold or more, and the PHR value is a positive number, the terminal may include serving beam information in the PHR. If the difference between the previous serving beam and the current serving beam is the threshold or more, and the PHR value is a negative number, the terminal may perform transmission by including both of the serving beam information and candidate beam information in the PHR.
  • a timer value may be included in the PHR information transmitted by the base station to the terminal through the RRC signaling, rather than the above mentioned two thresholds (threshold- 1 and threshold- 2 ).
  • the timer value may include a periodic PHR timer indicating a PHR transmission period, and a prohibit PHT timer indicating a timer in which PHR transmission is prohibited.
  • information on whether for how many beams the terminal needs to transmit PHR to the base station may be included in the PHR information transmitted by the base station to the terminal through the RRC signaling.
  • information on the number of beams is not transmitted together with the PHR information, but may be transmitted to the terminal through the RRC signaling, MAC control element/MAC message, or DCI when the base station transmits a beam-related parameter.
  • the terminal may determine for how many beams the terminal needs to transmit the PHR to the base station using the information on the number of beams transmitted together with the PHR information or the information on the number of beams transmitted while being included in the beam-related parameter.
  • the base station may perform configure for how many beams the terminal needs to transmit the PHR using the information on the number of beams transmitted together with the PHR information or the information on the number of beams transmitted while being included in the beam-related parameter.
  • N refers to the number of beams.
  • the terminal receiving this transmits PHR for N beams to the base station with a period of 10 subframes in operation 1 h - 40 .
  • the terminal may perform transmission to the base station by including a beam index for a serving beam and reception signal strength of the beam having a corresponding index in the PHR information.
  • the terminal may perform transmission to the base station by including a serving beam index, candidate beam indices, reception signal strength of the serving beam and candidate beams having a corresponding index in the PHR information.
  • the base station receiving the PHR information in a subframe “n” from the terminal compares the PHR information with PHR information received in a previous subframe “n ⁇ k” to determine whether to change a transmission beam used for a data channel or control channel transmitted by the terminal in uplink in a next subframe “n+j”.
  • the base station may inform the terminal of the changed beam index through the RRC signaling, MAC control element/MAC message, or DCI.
  • the terminal receiving this uses the corresponding beam at the time of next uplink transmission.
  • the base station may explicitly inform the terminal of the existing beam index through the RRC signaling, MAC control element/MAC message, or DCI.
  • the terminal receiving this uses the existing beam at the time of next uplink transmission.
  • the base station may not perform any operation.
  • the terminal operates a timer based on a point in time at which the terminal transmits PHR to the base station, and performs uplink transmission using the existing beam if a beam index (changed beam index) is not received through the RRC signaling, MAC control element/MAC message, or DCI until the timer expires.
  • a beam index change beam index
  • SCS subcarrier spacing
  • the terminal- 2 may interpret the M value to be 2, and the terminal- 1 may interpret the M value to be 1 ⁇ 4. Since the SCS used by the terminal- 1 is 1 ⁇ 4 times the SCS used by the terminal- 2 , in order for the terminal- 1 to maintain the same PSD as the terminal- 2 , the terminal- 1 needs to interpret the M value as 1 ⁇ 4 ( 2/8) even though 2 RBs are allocated. That is, depending on which value is used as a reference SCS, an operation of a terminal having a different SCS rather than the reference SCS may be changed. Therefore, a method for determining a reference SCS is required.
  • the base station transmits a synchronization signal to the terminal.
  • a base station- 1 using the center carrier frequency of 2 GHz may use the A value of 15 kHz, and a base station- 2 may use the A value of 60 kHz.
  • the terminal does not know the A value to be used at the center carrier frequency operated by the base station, thus may blindly find.
  • Operation 1 i - 20 The base station transmits uplink transmission power parameters to the terminal.
  • the parameters are transmitted through the SIB or RRC signaling, an SCS used for the transmission through the SIB or RRC signaling may be the same as or different from an SCS of a synchronization signal. If an SCS different from the SCS of the synchronization signal is used, indication therefor is required.
  • an SCS used for the SIB transmission may be indicated through the MIB.
  • an SCS used for the RRC signaling may be indicated through the MIB, SIB, or common DCI. If the same SCS as the SCS of the synchronization signal is used, separate indication is not required.
  • Operation 1 i - 30 If the same SCS as the SCS used for the synchronization signal transmission is used as a reference for determining an M value, separate reference numerology information is not required. If an SCS different from the SCS used for the synchronization signal transmission is used as a reference for determining the M value, separate indication may be required. The indication may be transmitted through the MIB, SIB, or common DCI.
  • a terminal using the same SCS as the SCS used for the synchronization signal transmission may apply the number of RBs indicated by the base station through the DCI to the M value as it is.
  • a terminal using the SCS different from the SCS used for the synchronization signal transmission may scale-up or scale-down the number of RBs indicated by the base station through the DCI based on the reference value (the SCS used for the synchronization signal transmission). For example, it is assumed that the SCS used for the synchronization signal transmission is 15 kHz, and the SCS used by the terminal for uplink transmission is 60 kHz.
  • the terminal reinterprets the M value to be 8 (2 ⁇ 4) and calculates transmission power.
  • the SCS used for the synchronization signal transmission is 240 kHz
  • the SCS used by the terminal for uplink transmission is 120 kHz. If the number of RBs indicated by the base station through the DCI is 4, the terminal reinterprets the M value to be 2 (4/2) and calculates transmission power.
  • the terminal may scale-up or scale-down the number of RBs indicated by the base station through the DCI based on the reference value.
  • the terminal performs uplink data and control information transmission using a calculated transmission power value.
  • the base station may transmit different transmission power control values to the terminal through the MIB, SIB, or common DCI depending on the SCS used in its cell. More specifically, a P0 value when using an SCS of 15 kHz and a P0 value when using an SCS of 30 kHz may be different from each other. For example, it is assumed that a terminal- 1 uses the SCS of 1 kHz, and a terminal- 2 uses the SCS of 30 kHz, and both of the terminal- 1 and the terminal- 2 receive allocation of 2 RBs for uplink data (or control information) transmission.
  • SCS subcarrier spacings
  • P0 value corresponding to the SCS of 15 kHz is configured for the terminal- 1
  • P0 value corresponding to the SCS of 30 kHz is configured for the terminal- 2
  • the same P0 value is used regardless of the SCS, but transmission power control of different SCSs may be defied by using the closed-loop power control parameter, f(i) in Equation 1-a.
  • f(i) the closed-loop power control parameter
  • a terminal- 1 uses the SCS of 1 kHz
  • a terminal- 2 uses the SCS of 30 kHz
  • both of the terminal- 1 and the terminal- 2 receive allocation of 2 RBs for uplink data (or control information) transmission.
  • the base station may control the f(i) value that may be used by the terminal- 1 and the terminal- 2 through the DCI ( ⁇ values included in f(i) are differently set).
  • the transmission beam of the terminal may be dynamically changed according to a motion of obstacles positioned between the base station and the terminal or a motion of the terminal.
  • the configuration of the power control parameter based on the RRC signaling mentioned above may not be preferable. Therefore, it is possible to perform more rapid adjustment of the transmission power through L1 signaling (configuration of the power control parameter values through the PDCCH). That is, one or all of and values may be transmitted to the terminal through the PDCCH.
  • a combination of the RRC signaling and the signaling through the PDCCH may be considered.
  • a set of parameters in FIGS. 1F and 1G may be configured by the RRC signaling, and which value in the set will be used may be configured through the PDCCH.
  • the parameters in FIGS. 1F and 1G are transmitted to the terminal through the RRC signaling, and which parameter in FIG. 1F (wide beam) and FIG. 1G (narrow beam) will be used at a specific moment (for example, specific subframe or specific slot) may be indicated by 1-bit of the DCI. That is, in the case of “1”, a narrow beam may be used, and in the case of “0”, a wide beam may be used. If three or more beam widths are used, indication may be made by using 2-bits or more of the DCI.
  • the closed-loop transmission power control may be performed in the beamforming system as well. That is, as illustrated in FIGS. 1F and 1G , the and values may be configured though the RRC signaling, and fine adjustment of transmission power for each beam may be dynamically made through the PDCCH. More specifically, the transmission power control of the uplink data channel may be represented by Equation 1-k below.
  • P xPUSCH ⁇ ( i ) min ⁇ ⁇ P CMAX ⁇ ( i ) , 10 ⁇ log 10 ⁇ ( M PUSCH ⁇ ( i ) ) + P 0 ⁇ _ ⁇ PUSCH ⁇ ( j ) + ⁇ ⁇ ( j ) ⁇ PL + ⁇ TF ⁇ ( i ) + f ⁇ ( i ) + ⁇ Beam ⁇ ( f ) ⁇ ⁇ [ dBm ] Equation ⁇ ⁇ 1 ⁇ - ⁇ k
  • P 0_PUSCH (j) and ⁇ (j) may vary depending on a beam index “j”.
  • ⁇ Beam (j) means a step size of power that may vary depending on the beam index “j” dynamically configured through the PDCCH.
  • ⁇ Beam may be dynamically configured through the PDCCH. Meanwhile, a transmission power value in consideration of a beam width may be reflected in the value configured through the PDCCH, as shown in Table 1-b and Table 1-c.
  • the transmission power control of the uplink control channel may be represented by Equation 1-l below.
  • P xPUCCH ( i ) min ⁇ P CMAX ( i ), P 0 PUCCH ( j )+ ⁇ ( j ) ⁇ PL+ h ( n CQI ,n HARQ ,n SR )+ ⁇ F PUCCH ( F )+ ⁇ T ⁇ D ( F ′)+ g ( i )+ ⁇ Beam ( j ) ⁇ [dBm] Equation 1-l
  • P 0_PUCCH (j) and ⁇ (j) may vary depending on a beam index “j”.
  • ⁇ Beam (j) means a step size of power that may vary depending on the beam index “j” dynamically configured through the PDCCH.
  • ⁇ Beam may be dynamically configured through the PDCCH. Meanwhile, a transmission power value in consideration of a beam width may be reflected in the value configured through the PDCCH, as shown in Table 1-b and Table 1-c.
  • ⁇ Beam (j) and ⁇ Beam in Equation 1-k and Equation 1-l may be the same as each other or different from each other.
  • a waveform used for a data and control channel transmitted by the terminal in uplink may vary according to an environment of the terminal or an operation of the base station.
  • the base station-A may use orthogonal frequency division multiple access (OFDM) as the uplink waveform.
  • the base station-B may use single carrier-frequency division multiple access (SC-FDMA) as the uplink waveform.
  • the base station-C may use both of the OFDMA and the SC-FDMA Information on which waveform among the uplink waveforms may be used may be cell-specifically transmitted by the base station to the terminal through the MIB or SIB.
  • agreement may be made between the base station and the terminal so that if “00” is transmitted through the MIB or SIB, the OFDMA is used, if “01” is transmitted, the SC-FDMA is used, and if “10” is transmitted, both of the OFDMA and SC-FDMA are used.
  • P CMAX value in Equation 1-k and Equation 1-l may be differently operated.
  • P CMAX may be determined by the terminal as in Equation 1-m below.
  • P CMAX_L min ⁇ P EMAX ⁇ T C ,P PowerClass ⁇ max ⁇ MPR+AMPR+ ⁇ T 1B + ⁇ T C ,PMPR) ⁇
  • P CMAX_H min ⁇ P EMAX ,P PowerClass ⁇ Equation 1-m
  • P CMAX_L means a small value of P CMAX
  • P CMAX_H means a large value of P CMAX
  • P CMAX_L and P CMAX_H may be determined in the terminal by parameters specified in Equation 1-m above, and characteristics of the uplink waveform used by the terminal may be reflected by using one or two or more of the parameters.
  • P EMAX is a maximum Tx power level that may be used by the terminal for UL transmission in a specific cell, and is a value informed by the base station through UE-specific RRC signaling.
  • the base station may reflect the uplink waveform used by the terminal when configuring PENAX. For example, when using the OFDMA, ⁇ A1 to Z1 ⁇ dB may be configured, and when using the SC-FDMA, ⁇ A2 to Z2 ⁇ dB may be configured.
  • P PowerClass is a value corresponding to a power class of the terminal, and may correspond to capability of the terminal.
  • P PowerClass may be differently applied depending on the waveform that may be used by the terminal in a specific cell. For example, it is assumed that P PowerClass of the terminal-A is 23 dBm based on the SC-FDMA. When the OFDMA is used, implicit agreement between the base station and the terminal may be made so that the terminal is operated at 23 dBm x dB. In x dB, the x value may be configured by the base station through the RRC signaling, or a fixed value may be used as the x value.
  • maximum power reduction may reflect an amount of frequency resources (the number of resource blocks (RBs)) allocated to the terminal for uplink data and control channel transmission, and modulation.
  • the MPR value may be configured to be different depending on the uplink waveform.
  • a value pre-agreed between the base station and the terminal may be used.
  • additional maximum power reduction is a value according to an adjacent channel leakage ratio (ACLR) and spectrum emission requirement. These values may be configured to be different depending on the waveform used by the terminal.
  • ACLR adjacent channel leakage ratio
  • ⁇ T 1B is a tolerance value according to a band combination in which communication is performed, and these values may be configured to be different depending on the waveform used by the terminal.
  • ⁇ T C is a value varying according to an aggregated channel bandwidth and a guard-band, and these values may be configured to be different depending on the waveform used by the terminal.
  • PMPR power amplifier-maximum power reduction
  • different parameter values may be configured by the base station through the common RRC signaling, dedicated RRC signaling, or DCI depending on the waveform used in uplink.
  • the terminal may perform transmission by adding power to a transmission power value calculated by the terminal itself through Equation 1-a or Equation 1-e as much as ⁇ 1 [dB].
  • the instruction to use the DFT-S-OFDM and the value of ⁇ 1 [dB] may be configured by the base station through the common RRC signaling, dedicated RRC signaling, or DCI as mentioned above.
  • the terminal may perform transmission by reducing power from the transmission power value calculated by the terminal itself through Equation 1-a or Equation 1-e as much as ⁇ 2 [dB].
  • the instruction to use the CP-OFDM and the value of ⁇ 2 [dB] may be configured by the base station through the common RRC signaling, dedicated RRC signaling, or DCI as mentioned above.
  • FIG. 1J is a diagram illustrating an example of a subframe for transmitting uplink data and control information according to an embodiment of the present disclosure.
  • a first symbol indicates a downlink control channel transmitted by the base station to the terminal in the cell (e.g., physical downlink control channel (PDCCH) of LTE).
  • PDCCH physical downlink control channel
  • the base station transmits the downlink control channel to the terminal (or the terminal receives the downlink channel from the base station), and then receives an uplink control channel from the terminal (or the terminal transmits the uplink channel to the base station).
  • a gap for switching TX/RX of RF is required (second symbol).
  • a demodulation reference signal (DMRS) for estimating by the base station the uplink channel of the terminal is required (third symbol).
  • a case in which an RS occupies the entire symbol is illustrated, but there may be various patterns for the DMRS (for example, one DMRS may exist for every four REs, and two DMRSs may continuously exist for every six REs on a frequency axis). Further, in this example, a case in which the DMRS exists only in the third symbol, but the DMRS may also exist in two or more symbols in one slot. When the DMRS is positioned only in the third symbol, data decoding becomes possible immediately after the estimation of the uplink channel of the terminal ends at the reception end of the base station, thus a signal processing time of the reception end may be decreased.
  • transmission may be made by including data and control information reported to the base station (uplink control information (UCI) of the terminal in an uplink (UL) data region indicated in FIG. 1J .
  • the UCI may include hybrid ARQ (HARQ) ACK/NACK information, a rank indicator (RI), a channel quality indicator (CQI), a pre-coder matrix indicator (PMI), and beam-related information (beam measurement information: beam index and a reception signal of a beam corresponding to each beam index are indicated as BMI).
  • HARQ hybrid ARQ
  • HARQ hybrid ARQ
  • HARQ hybrid ARQ
  • HARQ rank indicator
  • CQI channel quality indicator
  • PMI pre-coder matrix indicator
  • beam-related information beam measurement information: beam index and a reception signal of a beam corresponding to each beam index are indicated as BMI.
  • the mapping may improve channel estimation performs of the HARQ information, thus error probability may be decreased at the time of decoding the HARQ ACK/NACK information at the reception end.
  • the RI is rank information used for MIMO operation, and since an amount of CQI/PMI information may vary according thereto, the RI needs to be decoded prior to the CQI/PMI information. Therefore, the RI may be positioned next to the symbol in which the HARQ ACK/NACK information is transmitted.
  • the information amount of the CQI/PMI/BMI is larger than the HARQ ACK/NACK and RI, and may be mapped in a time-first manner as indicated by an arrow to obtain time diversity.
  • the last symbol of the slot may be used for uplink control channel (e.g., physical uplink control channel (PUCCH) of LTE).
  • PUCCH physical uplink control channel
  • FIG. 1K is a diagram illustrating another example of a subframe for transmitting uplink data and control information according to an embodiment of the present disclosure.
  • the RI information is positioned after the mapping of the HARQ ACK/NACK information is completed, and the mapping of the CQI/PMI/BMI may be made in a frequency-first manner as indicated by an arrow, rather than the time-first manner, after the mapping of the RI information is completed.
  • FIG. 1K it may seem that the HARQ ACK/NACK information and the RI information are mapped to only the same symbol, but the HARQ ACK/NACK information and the RI information may be mapped to different symbols as in FIG. 1J . This is for the CQI/PMI/BMI information with a relatively large amount of data to additionally obtain frequency diversity gain.
  • the base station may configure an addition DMRS in addition to the front-loaded DMRS.
  • the additional DMRS is configured as such, a rule for mapping of UCI for transmitting the UCI by multiplexing with data is required.
  • the rule for mapping of UCI may be the same as FIGS. 1J and 1K regardless of presence and absence of the additional DMRS as illustrated in FIGS. 1LA and 1MA .
  • An advantageous of the method is that since the same mapping rule may be applied regardless of presence and absence of the additional DMRS, implementation of the base station and the terminal may be easily made. However, if an amount of UCI is increased, and a change of the time axis of the channel is large, channel estimation performance of the UCI mapped while being far away from the front-loaded DMRS may deteriorate. Further, if frequency hopping of the PUSCH (UL data region) is supported in order to maximize the frequency diversity gain, since the UCI is mapped to only the vicinity of the first DMRS (front-loaded DMRS) (that is, the UCI is not mapped to the vicinity of the second DMRS), the frequency diversity gain may not be sufficiently obtained. Accordingly, as illustrated in FIGS.
  • a mapping rule for making the UCI to be appropriately distributed based on two DMRSs may be required when an additional DMRS is configured from the base station.
  • the UCIs are appropriately distributed based on two DMRSs, thereby improving channel estimation performing of the UCIs. Further, when applying the frequency hopping, the frequency diversity gain may be maximized.
  • FIG. 1N is a diagram illustrating an example of transmission of a reference signal (SRS) for channel sounding according to an embodiment of the present disclosure.
  • the terminal may periodically or aperiodically perform SRS transmission.
  • the base station receiving the SRS may acquire uplink channel and timing information of the terminal.
  • the operation may be made under an assumption that channel information acquired through the SRS received by the base station from the terminal through uplink is similar to downlink channel information (UL/DL reciprocity).
  • the SRS may be transmitted by being time division multiplexed (TDM) or frequency division multiplexed (FDM) with the uplink control channel.
  • TDM time division multiplexed
  • FDM frequency division multiplexed
  • This example is a case in which the SRS is transmitted by being time division multiplexed, and a case in which the SRS and the uplink control channel occupy the entire UL bandwidth is illustrated, but the SRS and the uplink control channel may occupy part of the UL bandwidth, and the bandwidths thereof may be different.
  • the transmission bandwidth of the SRS may use A tones
  • the uplink control channel may use B tones.
  • the SRS transmission may be instructed through the downlink control channel or RRC signaling, and once the instruction is transmitted, the SRS may be periodically transmitted for a predetermined period or transmitted only once.
  • transmission resources of the SRS in the system may be one or two symbols on the time axis in one slot (or subframe or multi-slot). That is, the terminal transmits the SRS once in one or two symbols allocated in a slot for the SRS transmission by the system.
  • FIG. 1O is a diagram illustrating another example of transmission of a reference signal (SRS) for channel sounding according to an embodiment of the present disclosure.
  • SRS reference signal
  • FIG. 1O A difference from the FIG. 1N is that the terminal transmits the SRS two or more times in two or more symbols, rather than transmitting once in one symbol.
  • one terminal transmits the SRS 10 times through 10 symbols.
  • the SRSs transmitted through each symbol may be transmitted in different beam directions.
  • FIG. 1O a case in which a third symbol is to be used for DMRS transmission is illustrated, but the third symbol may be used for SRS symbol transmission in place of DMRS transmission.
  • the last symbol is used for uplink control channel, but it may also be replaced with the SRS symbol transmission.
  • the base station may perform indication for signal transmission or multiple transmission of the SRS.
  • the indication may be made through L1-signaling (e.g., DCI of PDCCH).
  • information on in how many symbols the SRS will be transmitted may be included in the DCI.
  • the slot/subframe/mini-slot in which the multiple transmission of the SRS is possible may be set through the signaling together with the information on in how many symbols the SRS will be transmitted.
  • the terminal receiving this transmits the corresponding number of SRSs in the corresponding slot/subframe/mini-slot.
  • the RRC signaling and the L1 signaling may be combined.
  • the slot/subframe/mini-slot in which the multiple transmission of the SRS is possible may be configured through the RRC signaling, and in how many symbols the SRS will be transmitted may be determined using a fixed value (for example, fixing the fixed number in standard).
  • the base station may indicate a slot/subframe/mini-slot in which actual transmission is made among slots/subframes/mini-slots configured through the RRC through 1-bit of the DCI.
  • a slot/subframe/mini-slot in which multiple transmission of the SRS is configured through the RRC signaling, and in how many symbols the SRS will be transmitted in the corresponding slot/subframe/mini-slot may be indicated by the base station through the DCI.
  • FIG. 1P is a diagram illustrating an operation of a terminal and a base station according to an embodiment of the present disclosure.
  • the terminal and the base station may be in an RRC connection state.
  • the terminal may perform operations 1 a - 10 , 1 a - 20 , and 1 a - 30 in FIG. 1A , and be in an RRC connection state.
  • the terminal and the base station may perform the operation described with reference to FIGS. 1B, 1C, 1D , and 1 E in the random access process.
  • the terminal may receive UE-specific transmission power parameter from the base station.
  • the terminal may receive the UE-specific transmission power parameter through the RRC signaling, MAC control element/MAC message, or DCI, and may also receive the UE-specific transmission power parameter according to a combination of at least two of the messages. For example, some information of the UE-specific transmission power parameter is received through the RRC signaling, and some information may be received through the DCI.
  • the UE-specific transmission power parameter may include the transmission power parameter described in operation 1 a - 40 in FIG. 1A . Further, the UE-specific transmission power parameter may include the transmission power parameter described in FIGS. 1F and 1G . Further, the UE-specific transmission power parameter may include the transmission power parameter described in operations 1 h - 10 and 1 h - 20 in FIG. 1H , and the transmission power parameter described in operations 1 i - 20 and 1 i - 30 in FIG. 1I .
  • a combination of the RRC signaling and the signaling through the PDCCH may be considered.
  • a set of parameters in FIGS. 1F and 1G may be configured by the RRC signaling, and which value in the set will be used may be configured through the PDCCH.
  • the base station may signal a P0 value as a reference through RRC and then signal an offset value with an actually used beam from the reference through RRC or DCI.
  • the transmission power parameter may include a parameter (information on a beam) for path-loss for each beam as mentioned in FIG. 1H .
  • path-loss may be considered, and in the hybrid beamforming system, there may be a number of beams according to combinations of the transmission beam of the base station and the reception beam of the terminal. Therefore, path-loss calculation for each beam is required.
  • the base station may indicate for how many beams the terminal needs to perform path-loss measurement and store through the RRC signaling, MAC control element/MAC message, or DCI.
  • the base station may provide information on a beam which may indicate a beam for which the path-loss measurement to be performed. For example, a beam index or beam index set may be indicated.
  • the terminal may measure path-loss for the indicated beam, and determine transmission power based on the measured path-loss.
  • the transmission power parameter may include information on subcarrier spacing (SCS) for interpreting a M value as mentioned in FIG. 1I .
  • SCS subcarrier spacing
  • the transmission power parameter is not limited to the above configuration but may include parameters mentioned in respective embodiments of the present disclosure.
  • the terminal may calculate transmission power based on a UE-specific transmission power parameter.
  • the terminal may determine transmission power for uplink data channel transmission and/or transmission power for uplink control channel transmission.
  • the terminal may also calculate transmission power by combining transmission power parameters received through the RRC signaling and the PDCCH.
  • the terminal may determine transmission power in consideration of path-loss for each beam.
  • the terminal may interpret the M value in consideration of information on the SCS, and maintain PSD by interpreting the M value.
  • the terminal is not limited to the above configuration but may determine transmission power in consideration of various parameters mentioned in respective embodiments of the present disclosure.
  • the terminal may transmit uplink.
  • Transmitting uplink may represent transmitting at least one of an uplink channel (data channel and control channel), an uplink signal, uplink data, and uplink information.
  • FIG. 1P Detailed operations of the terminal and the base station are not limited to FIG. 1P , and a detailed operation corresponding to each parameter in FIG. 1P refers to the operations of the terminal and the base station described with reference to FIGS. 1A to 10 .
  • FIG. 1Q is a diagram illustrating a configuration of a terminal according to an embodiment of the present disclosure.
  • the terminal may include a transceiver 1 q - 10 , a controller 1 q - 20 , and a memory 1 q - 30 .
  • the controller 1 q - 20 may be defined as a circuit or application-specific integrated circuit or at least one processor.
  • the transceiver 1 q - 10 may transmit and receive a signal to and from other network entity.
  • the transceiver 1 q - 10 may receive system information from the base station, and may receive a synchronization signal or a reference signal.
  • the controller 1 q - 20 may control a general operation of the terminal according to an embodiment suggested in the present disclosure.
  • the controller 1 q - 20 may control the operation of the terminal described with reference to FIGS. 1A to 1P of the present disclosure.
  • the controller 1 q - 20 may control to receive a terminal-specific transmission power parameter from the base station, determine transmission power of the terminal based on the terminal-specific transmission power parameter and a subcarrier spacing allocated to the terminal, and transmit an uplink signal based on the determined transmission power. Further, the controller 1 q - 20 may control to apply an M value used in determining the transmission power based on the subcarrier spacing.
  • the terminal-specific transmission power parameter includes information on a beam, and the transmission power may be determined based on path-loss measured based on the information on the beam.
  • controller 1 q - 20 may control to receive a radio resource control (RRC) message including a set of transmission power parameters, and receive a physical downlink control channel (PDCCH) including information indicating a transmission power parameter used in determining the transmission power among the set of the transmission power parameters.
  • RRC radio resource control
  • PDCCH physical downlink control channel
  • the memory 1 q - 30 may store at least one of information transmitted and received through the transceiver 1 q - 10 and information generated through the controller 1 q - 20 .
  • FIG. 1R is a view illustrating a configuration of a base station according to an embodiment of the present disclosure.
  • a configuration of the base station may also be used as a structure of a TRP. Further, the TRP may also be configured as a part of the configuration of the base station.
  • the base station may include a transceiver 1 r - 10 , a controller 1 r - 20 , and a memory 1 r - 30 .
  • the controller 1 r - 20 may be defined as a circuit or application-specific integrated circuit or at least one processor.
  • the transceiver 1 r - 10 may transmit and receive a signal to and from other network entity.
  • the transceiver 1 r - 10 may transmit system information to the terminal, and may transmit a synchronization signal or a reference signal.
  • the controller 1 r - 20 may control a general operation of the base station according to an embodiment suggested in the present disclosure.
  • the controller 1 r - 20 may control the operation of the base station described with reference to FIGS. 1A to 1O of the present disclosure.
  • the controller 1 r - 20 may control to transmit a message including subcarrier spacing configuration information to the terminal, transmit a terminal-specific transmission power parameter to the terminal, and receive an uplink signal from the terminal.
  • the transmission power of the uplink signal may be determined based on the terminal-specific transmission power parameter and the subcarrier spacing configuration information. Further, an M value used in determining the transmission power may be applied based on the subcarrier spacing configuration information.
  • the terminal-specific transmission power parameter includes information on a beam, and the transmission power may be determined based on path-loss measured based on the information on the beam.
  • controller 1 r - 20 may control to transmit a radio resource control (RRC) message including a set of transmission power parameters, and transmit a physical downlink control channel (PDCCH) including information indicating a transmission power parameter used in determining the transmission power among the set of the transmission power parameters.
  • RRC radio resource control
  • PDCCH physical downlink control channel
  • the memory 1 r - 30 may store at least one of information transmitted and received through the transceiver 1 r - 10 and information generated through the controller 1 r - 20 .
  • a DL common control signal includes synchronization signals (sync signals), a channel (or channels) transmitting essential system information for at least performing random access (i.e., PBCH), a signal used for RRM measurement, and a signal used for L3 mobility.
  • PBCH synchronization signals
  • RRM measurement beam measurement may be included.
  • the DL common control signal needs to be broadcasted so that users in the cell or neighboring cells may hear.
  • the sync signals may include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a tertiary synchronization signal (TSS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • TSS tertiary synchronization signal
  • the PSS/SSS may be used for coarse timing frequency synchronization, and may also be used for detecting a cell-ID. Alternatively, the PSS/SSS may also be used for selecting a coarse TRP transmission beam.
  • SF subframe
  • the system may be designed so as to recognize the boundary of SF/slot using an SSS sequence and PBCH information.
  • new synchronization signal such as a tertiary synchronization signal (TSS) may be introduced.
  • TSS uses different sequences for each OFDM symbol such that from which OFDM symbol a beam detected by the terminal is transmitted may be known, thereby being used to determine the boundary of SF/slot.
  • the DL common control signals need not be transmitted frequently, and the system may be designed so that a transmission period of the DL common control signals is variably changed.
  • the transmission is made while variably changing the transmission period of the DL common control signal (i.e., configurable DL common control signal)
  • the following effects may be expected:
  • a network for each cell autonomically determines a period of the synchronization.
  • FIG. 2A is a diagram illustrating an example of Alternative scenario 1.
  • a to F in FIG. 2A mean different physical channels, and each channel may be used for the following purpose.
  • Measurement reference signal used by at least non-connected UE for mobility and measurement.
  • the corresponding signal may also be used by connected UE in some cases.
  • Measurement reference signal used by at least connected UE for mobility and measurement.
  • a non-connected UE means a terminal that is in an idle state or attempts to newly access.
  • the physical channels A/B/C may be or may not be included in one SS block defined in NR. Further, periods of the physical channels A/B/C may be the same as or different from each other. For example, the physical channels A and B are included in one SS block, and may have the same period. However, the physical channel C may have a period different from that of the physical channels A/B in the system. Similarly, the physical channels D/E/F may be or may not be included in one SS block defined in NR. Further, periods of the physical channels D/E/F may be the same as or different from each other.
  • a detailed TRP/UE operation in Alternative scenario 1 is as follows.
  • Step 1 A non-connected UE reads A and performs cell-ID detection through a PSS/SSS.
  • Step 2 If a beam-swept PSS/SSS signal is transmitted to a continuous OFDM symbol, detection of a boundary of a SF or slot is performed through an SSS, PBCH, or TSS.
  • Step 3 is decoded based on cell-ID information detected in Step 1.
  • B may be a single physical channel or multiple physical channels, and basically serves to transmit essential system information for at least performing initial access and random access.
  • B is self-decodable.
  • B may have at least the following information: i) configuration of C if needed, ii) system bandwidth (BW), iii) system frame number (SFN), iv) information for performing, by the terminal, random access (e.g., random access resource configuration).
  • BW system bandwidth
  • SFN system frame number
  • iv information for performing, by the terminal, random access (e.g., random access resource configuration).
  • Step 4 If configuration information of C is transmitted through B, the UE receives C.
  • C may be used for i) initial cell selection/cell re-selection, and ii) beam-ID acquirement.
  • a sync signal i.e., A
  • C may not be transmitted.
  • C is a designated signal determined according to cell-ID
  • a non-connected UE does not perform Step 3
  • cell-selection and re-selection may be performed through C.
  • Step 5 Random access is performed.
  • the UE is changed to be in an RRC connected state.
  • Step 6 The UE receives D. Period information of D may be transmitted to the UE in Steps 1 to 5.
  • Sequences of PSS/SSS of A and D may not be the same as each other. For example, sequence lengths or sequence values themselves may be different from each other.
  • A includes an SF/slot boundary detection function (for example, through the SSS sequence, PBCH contents, TSS, or the like), D may not need to include the SF/slot boundary detection function. For example, if A includes a TSS, D need not include a TSS.
  • Step 6 The UE decodes E.
  • Frequency/time axis mapping (e.g., FDM) of D and E may be the same as or different from frequency/time axis mapping of A and B.
  • E and B may include or may not include the same contents.
  • F and C are signals having the same form (e.g., the same sequence and the same time/frequency mapping)
  • configuration for F need not be made in E. That is, after configuring C in B, F which is a mobility/measurement signal for the connected UE may be transmitted at the same period as D. At this time, a frequency/time mapping relationship of F and D may be the same as a frequency/time mapping relationship of C and A.
  • D/E is not separately transmitted, only F may be transmitted.
  • E may include configuration for F.
  • E may not be transmitted.
  • Step 7 If F is transmitted, F may be received.
  • F may be the same as or may not be the same as C.
  • F may be used for i) handover and ii) L1/L2 mobility.
  • an HO operation may be performed based on a sync signal (i.e., A and/or D) or measurement through C.
  • C may be a pre-designated signal for each cell-ID, and in this case, the non-connected UE may not separately receive PBCH for cell-selection or re-selection (Step 3 is unnecessary).
  • the non-connected UE if C does not exist, and the non-connected UE performs cell-selection and re-selection through the sync signal (i.e., A), Steps 3 and 4 are unnecessary.
  • the sync signal A is transmitted at a predetermined period, thus may be received by both of the non-connected UE and the connected UE of the corresponding cell, and a period of the sync signal D may be known only when in the connected state, therefore, the non-connected UEs basically may not receive the corresponding information.
  • the corresponding information may be transmitted to the UE by the following method:
  • information in PBCH may not be changed for a predetermined time (for example, the same PBCH is transmitted for 40 ms in the case of LTE), thus the non-connected UE may combine periodically transmitted multiple B channels at the time of receiving and decoding the PBCH information. This enables more robust PBCH decoding.
  • the connected UE may more rapidly decode the same system information as compared to the non-connected UE.
  • B is configured of multiple channels, and information included in B is part of information included in B, E may have the same form (e.g., code rate, frequency/time axis mapping) as one of the channels configuring B.
  • E may have the same form (e.g., code rate, frequency/time axis mapping) as one of the channels configuring B.
  • Contents and channel forms included in B and E may not be the same as each other, and periods during which information included in B and E is maintained may also be different from each other (for example, information in PBCH 1 is maintained to be the same for 400 ms, and information in PBCH 2 is maintained to be the same for 40 ms.)
  • Forms of C and F may be the same as each other (for example, the same sequence and the same time/frequency mapping), and at this time, separate configuration for F may not be performed in E. This is because F may be transmitted based on information of C configured in B and period information of D. At this time, a frequency/time mapping relationship of A and C may be the same as or different from a frequency/time mapping relationship of D and F.
  • FIG. 2B is a diagram illustrating an example of Alternative scenario 2.
  • a to F in FIG. 2A mean different physical channels, and each channel may be used for the following purpose.
  • Step 1 A non-connected UE reads A and performs cell-ID detection through a PSS/SSS.
  • Step 2 If a beam-swept PSS/SSS signal is transmitted to a continuous OFDM symbol, detection of a boundary of a SF or slot is performed through an SSS, PBCH, or TSS.
  • a period of the synchronization is selected in the network, thus the terminal needs to perform blind detection.
  • the network may select one of synchronization periods ⁇ 5 ms, 20 ms, 40 ms ⁇ , the terminal may use 5 ms which is the smallest value for synchronization signal detection.
  • robust B decoding may be performed by combining multiple Bs periodically transmitted as the same contents are transmitted for a predetermined time.
  • a definite period e.g., 5 ms, 20 ms, 40 ms
  • the period value may be transmitted through one or more of the synchronization signals (i.e., PSS, SSS, TSS).
  • PSS synchronization signals
  • SSS SSS
  • TSS TSS
  • the TSS uses different sequences according to each period value, and configures one sequence in a cyclic form for one period value, thereby presenting multiple OFDM symbols, such that an SF boundary may be distinguished. If periods of A and B are the same as each other, the UE may acquire the period of A and B through the above method.
  • Step 3 The UE decodes B based on the period information acquired in Step 2.
  • B may be a single physical channel or multiple physical channels, and basically serves to transmit essential system information for performing initial access and random access.
  • B may have at least the following information: e.g., i) configuration of C (if needed), ii) system BW, iii) system frame number, and iv) information for performing RA.
  • Step 4 If C is configured through B, the UE receives C.
  • C may be used for i) cell selection/re-selection, and ii) beam-ID acquirement.
  • the cell-selection and re-selection operation of the non-connected UE may be performed through the sync signal (i.e., A).
  • C is a designated signal determined according to cell-ID
  • a non-connected UE does not perform Step 3
  • cell-selection and re-selection may be performed through C.
  • Step 5 Random access is performed.
  • the UE is changed to be in an RRC connected state.
  • Step 6 A and B are respectively received for synchronization and PBCH reception in the connected state.
  • Step 7 If C is transmitted, the UE (connected) receives C.
  • C may be used for i) handover, and ii) beam-ID update.
  • the UE In the case in which the UE performs the cell-selection/re-selection based on A in the non-connected state, the UE is changed to be in the connected state, and then may receive configuration information on C included in B and use the received information for i) handover and ii) L1/L2 mobility.
  • an HO operation may be performed based on measurement through a sync signal (i.e., A).
  • C may be a pre-designated signal for each cell-ID, and in this case, the non-connected UE may not separately receive PBCH for cell-selection or re-selection (Step 3 is unnecessary).
  • the non-connected UE if C does not exist, and the non-connected UE performs cell-selection and re-selection through the sync signal (i.e., A), Steps 3 and 4 are unnecessary.
  • the non-connected UE performs the cell-selection/re-selection through the sync signal (e.g., A) without performing Step 3, and then may be RRC connected through random access, and after connection establishment, B is received to find out configuration for C, and the configuration may be used for handover and L1/L2 mobility.
  • the sync signal e.g., A
  • the period value information is transmitted through a sequence, thus the terminal continuously detect a sync sequence, thereby checking whether the period of synchronization is updated from the existing value. At this time, information is transmitted before the period is actually changed, such that the terminal may immediately receive the updated synchronization. At this time,
  • C and/or F which is a signal for mobility/measurement may be used for the UE to perform handover.
  • the corresponding information may include period information of C and/or F, frequency/time mapping information, the number of antenna ports used to transmit C and/or F, and the like.
  • a method for acquiring information on a measurement signal (i.e., C and/or F) of a neighboring cell is as follows.
  • Alternative 1-1 In the case in which C and F are the same signal, and transmitted together with the sync signal (e.g., FIG. 2A ), the terminal decodes B of a neighboring cell after receiving A of the neighboring cell, thereby acquiring configuration information (mapping, pattern, and period information) for C and/or F of the neighboring cell. This information is used for measurement for HO later.
  • the terminal decodes B of the neighboring cell after receiving A of the neighboring cell, thereby acquiring configuration information (mapping, pattern, and period information) for C of the neighboring cell. This information is used for measurement for HO later.
  • a serving cell TRP may inform mobility measurement signal information of the neighboring cell. For example, the serving cell TRP may inform a period of C and/or F of the neighboring cell or a period of D of the neighboring cell together with a cell-ID of the neighboring cell through the SIB (cell-specific RRC signaling) or UE-specific RRC signaling.
  • SIB cell-specific RRC signaling
  • configuration information of C and/or F may also be transmitted together through the cell-specific or UE-specific RRC signaling.
  • the configuration information of C and/or F may include period information, frequency/time mapping information, the number of antenna ports used to transmit C and/or F, and the like.
  • C and/or F is a designated signal that may be selected only with the cell-ID
  • the terminal may perform neighboring cell measurement by acquiring only the period information without other information of C and/or F of the neighboring cell.
  • the period information of C and/or F of the neighboring cell may be informed by the TRP of the serving cell to the UE through the SIB (cell-specific RRC signaling) or UE-specific RRC signaling.
  • the terminal performs beam sweeping
  • a situation in which a measurement signal needs to be received through an RX beam having different directivity, rather than an RX beam associated with the current serving cell may occur. Therefore, while the terminal performs measurement for the neighboring cell, there is a need for the serving cell not to transmit a DL signal for the terminal (see FIG. 2C ). As such, there is a need to designate a section (i.e., measurement gap) allowing measurement for the neighboring cell of the terminal.
  • the following methods may be used.
  • the TRP informs period information of the measurement gap and a start point (e.g., SF number) of the measurement gap for each UE through the UE-specific RRC signaling. In the measurement gap designated for the UE, DL information for the corresponding UE is not transmitted.
  • a start point e.g., SF number
  • Period information of D is acquirement through PBCH after receiving A of the neighboring cell, and after receiving D, configuration information of C and/or F is acquired through E. C and/or F, or A and C and/or F are simultaneously used for measurement.
  • period information of D is acquired through PBCH of the neighboring cell, and D, or A and D are used for measurement.
  • a serving cell base station may inform information of a mobility/measurement signal of a neighboring cell base station. For example, a period of D and/or a period of C/F may be transmitted together with a cell-ID of the neighboring cell through the SIB (cell-specific RRC signaling) or UE-specific RRC signaling.
  • SIB cell-specific RRC signaling
  • UE-specific RRC signaling UE-specific RRC signaling
  • the terminal performs beam sweeping together with measurement based on synchronization
  • a situation in which a measurement signal needs to be received through an RX beam having different directivity, rather than an RX beam associated with the current serving cell may occur. Therefore, while the terminal performs measurement for the neighboring cell, there is a need for the serving cell not to transmit a DL signal for the terminal (concept similar to FIG. 2C ). As such, there is a need to designate a section (i.e., measurement gap) allowing measurement for the neighboring cell of the terminal.
  • the following method may be used.
  • the TRP informs period information of the measurement gap and a start point (e.g., SF number) of the measurement gap for each UE through the UE-specific RRC signaling.
  • a start point e.g., SF number
  • DL information for the corresponding UE is not transmitted.
  • D of the serving cell is not transmitted as well.
  • the information may be transmitted to the neighboring cell by the following methods.
  • the terminal decodes B after receiving A of the neighboring cell to acquire configuration information (mapping, pattern, and period information) for C. This information is used for measurement for HO later.
  • Measurement is performed by receiving only A of the neighboring cell.
  • a serving cell base station may inform information of a mobility/measurement signal of a neighboring cell base station. For example, period information of C may be transmitted together with a cell-ID of the neighboring cell through the SIB (cell-specific RRC signaling) or UE-specific RRC signaling.
  • SIB cell-specific RRC signaling
  • UE-specific RRC signaling UE-specific RRC signaling
  • the measurement gap is also needed for the case of Alternative scenario 2.
  • Period values of C, D, E, and/or F are updated through channel B. Only the period information for some physical channels of C, D, E, and/or F may be transmitted. The terminal check whether the update is made from the existing value by continuously receiving the transmitted period value.
  • the period value information is transmitted through a sequence, thus the terminal continuously detect a sync sequence, thereby checking whether the period of synchronization is updated from the existing value. At this time, information is transmitted before the period is actually changed, such that the terminal may immediately receive the updated synchronization. At this time,
  • C, D, E, and/or F of the neighboring cell may be used.
  • the change information needs to be acquired by the terminal.
  • the terminal may directly acquire the corresponding information by receiving A and/or B, but if the serving cell base station transmits the corresponding information to the terminal in the serving cell, the following methods may be used.
  • the corresponding information may also be transmitted through the channel together.
  • the changed period information of the neighboring cell is transmitted through Alternative 1
  • the changed measurement gap information for each terminal may be transmitted through the RRC reconfiguration message.
  • the changed period information of the neighboring cell and the changed measurement gap information for each terminal may be transmitted through the PDSCH.
  • the terminal When the terminal intends to perform measurement for the neighboring cell, if a signal (A, C, D, and/or F) that may perform the measurement of the neighboring cell is not transmitted, the terminal may request the signal for performing the measurement to the serving base station. Thereafter, the serving base station may transmit or not transmit the signal for the measurement by transmitting the corresponding request to the neighboring cell.
  • a signal A, C, D, and/or F
  • the terminal may check whether or not a measurement signal of a neighboring cell is transmitted through the serving cell base station, or by directly receiving A/B of the neighboring cell. For example, if the serving cell base station informs a cell-ID of the neighboring cell through the SIB or UE-specific RRC signaling, but measurement signal information for the corresponding cell is not transmitted, and the terminal intends to perform measurement for the corresponding neighboring cell, the terminal may request transmission of the measurement signal of the neighboring cell to the serving cell through the PUCCH or PDSCH.
  • the serving cell base station informs the corresponding fact to the neighboring cell, such that the neighboring cell may not transmit the measurement signal when it is not necessary, thereby helping decrease energy consumption of the base station.
  • a process of finding a reception beam for receiving paging information through UE Rx beam sweeping during a short period of time is required after waking up for receiving the paging information.
  • a or C may be used therefor, and in order to perform the corresponding operation within a short time, A and C need to be repeatedly transmitted many times ( FIG. 2D ).
  • a subcarrier spacing for synchronization transmission for a non-connected UE is designed to be larger than a subcarrier spacing for data transmission, such that a sync signal transmitted in the same beam is repeated multiple times for nominal symbol duration (one symbol duration of data).
  • the terminal may perform reception beam sweeping for selecting a Rx beam through the sync signal transmitted multiple times within the corresponding time ( FIG. 2D ).
  • Synchronization for the synchronization transmission for the non-connected UE may be repeatedly transmitted multiple times using the same subcarrier spacing as that of the data ( FIG. 2D ).
  • a case of transmission of a sync signal with high density and a case of transmission of a sync signal with low density may be mixedly used.
  • a sync signal for the non-connected UE with high sync density may be transmitted occasionally for terminal waking up to receive paging information.
  • a sync signal for the non-connected UE with low sync density is transmitted.
  • the sync signal for the non-connected UE with high sync density may be generated by the method introduced in Alternative 1/2 above.
  • the terminal intending to receive paging information may wake up earlier than an originally scheduled point in time to receive the sync signal for the non-connected UE with high sync density, and a period of the sync signal for the non-connected UE with high sync density may be configured through the MIB, SIB, UE-specific RRC signaling, and the like when in the connected state.
  • a boundary of a subframe (SF) or slot may not be recognized by synchronization using the PSS and SSS.
  • the system may be designed so as to recognize the boundary of slot/subframe using the SSS sequence and PBCH information.
  • a new synchronization signal may be introduced for the corresponding function (i.e., or tertiary synchronization signal (TSS)).
  • TSS tertiary synchronization signal
  • the TSS uses different sequences for each OFDM symbol such that from which OFDM symbol a beam detected by the terminal is transmitted may be known, thereby being used to determine the boundary of slot/subframe.
  • the measurement for the neighboring cell may be performed through a synchronization signal (SS) or a reference signal for measurement.
  • SS synchronization signal
  • the synchronization signal is transmitted through a more wide beam as compared to the reference signal for measurement, and may be transmitted only in a relatively narrow band, accuracy of a measurement value (metric) may deteriorate.
  • metric a measurement value
  • units of beam sweeping time of the synchronization signal and the reference signal for measurement are the same as each other (e.g., 2 subframes), and both of the two signals may be used as a signal for measurement (RRM measurement of a terminal), thus the two signals will hereinafter be referred to as a “measurement signal”.
  • signals like the TSS and the reference signal for measurement need to be cell-specific, periodically transmitted, and beam-swept to be transmitted. This is because the corresponding signals are signals that may be received by all users in any position in a cell.
  • FIGS. 2F and 2G a division of the signal beam-swept in the multi-beam system is shown in FIGS. 2F and 2G .
  • a burst may occupy one slot or one subframe, and a burst set basically may include a signal that is beam-swept of one period.
  • a burst set period indicates a period in which a burst set is generated.
  • a subunit configuring burst is a block. Each block may be transmitted using different transmission beams. Each block may be configured of a single or a plurality of OFDM symbols.
  • FIG. 2F shows a case in which a burst is continuously transmitted in a burst set period
  • FIG. 2G shows a case in which a burst is discontinuously transmitted in a burst set period.
  • the TSS burst set period and a burst set period of a measurement signal are the same as each other.
  • terminal In order for the terminal to perform measurement using the measurement signal, terminal needs to know configuration information for the corresponding measurement signal. For receiving the corresponding measurement signal in the multi-beam system, the terminal needs the following configuration information:
  • a block number in a burst set (that is, slot/frame boundary)
  • the NR system is basically based on the multi-beam in above-6 GHz band, however, in some cells (or TRP or TRP group), a single-beam based system may also be driven, rather than the multi-beam based system.
  • the single-beam based system is a special case of the multi-beam-based system, and beam sweeping the cell-specific signals is not accompanied unlike the multi-beam based system. That is, it refers to a situation in which the number of block in a burst is 1.
  • Information 4 is to transmit information on this through the TSS.
  • the TSS may be used to inform terminal of the configuration information of the measurement signal described above.
  • the information may be more rapidly and conveniently acquired as compared to the case in which the configuration information of the measurement signal can be acquired only when the terminal performs PBCH.
  • Some of three Information above may be fixed to standard, and in this case, the information on the fixed information need not be transmitted through the TSS. For example, if the terminal uses a synchronization signal as the measurement signal, Information 3 need not be transmitted through the TSS.
  • TSS design the following embodiments are possible.
  • FIG. 2H shows an example of a cyclic shift index of the TSS for transmitting Information 1 and Information 2 in a case in which sequence having a length of L (that is, d(0), . . . , d(L-1)) is used as a basic sequence for the TSS; in a case in which one block is one OFDM symbol; in a case in which a unit occupied by one burst is one subframe; and a period of a burst set is 1,2 or 4 frames.
  • L that is, d(0), . . . , d(L-1)
  • the terminal may acquire Information 1 and Information 2 through the received TSS sequence. For example, if a TSS detection result received by the terminal indicates that the sequence is [d(14), d(L ⁇ 1), d(0), d(13)], it may be appreciated that the measurement signal is transmitted through one time of beam sweeping during two subframes, and an OFDM symbol receiving the TSS is a first OFDM symbol in the subframe (symbol number in the subframe is 0).
  • Embodiment 2-2 A TSS structure for transmitting information 1/2/4 is proposed. With the extension of embodiment 2-1, the information 1/2/4 can be transmitted by making the root index of the TSS sequence different, and an example of which is shown in FIG. 2I .
  • Embodiment 2-3 A TSS structure for transmitting information 1/2/4 is proposed.
  • the information 1/2/4 can be transmitted by making the cyclic shift and the root index of the TSS sequence different, and an example of which is shown in FIG. 2 m.
  • Embodiment 3-1) It is possible to distinguish information 1, information 2, and information 3 using different versions of cyclic shifts and root indices.
  • FIG. 2 n shows an example of the root index and the cyclic shift index of the TSS for transmitting the information 1/2/3 when a sequence (i.e., du (0), . . . , du (L ⁇ 1)) of length L whose root index is u is used as a basic sequence for TSS; when one block is one OFDM symbol; when a unit occupied by one burst is one subframe; and when a period of a burst set is one, two, or four frames; and when the number of antenna ports is 1, 2, or 4.
  • a sequence i.e., du (0), . . . , du (L ⁇ 1)
  • the terminal can know the information 1 and the information 2 through the received TSS sequence. For example, if the root index of the sequence is r2 and the sequence value is [d(1), . . . , d(L ⁇ 1), d(0)] as a result of the TSS detection received by the terminal, the measurement signal is transmitted through two antenna ports in one OFDM symbol (i.e., transmitted in two different directions of beam), and the number of bursts in the burst set is one, and the OFDM symbol receiving the TSS in the burst set is a second OFDM symbol (symbol number 1 in a subframe).
  • the method for dividing the information 2 through the root index of the TSS sequence, and dividing the information 1 and the information 3 through the cyclic shift index is possible.
  • Embodiment 3-2 In distinguishing Information 1/2/3/4, as described in Embodiment 1-2 or 2-2, when the number of burst in a burst set is 1, in order to distinguish a single-beam based system and a multi-beam based system, the TSS sequence root index or the cyclic shift of the TSS sequence, etc. may be used.
  • PBCH decoding may be performed based on the information acquired through the TSS.
  • a scrambling sequence of the PBCH may be differently applied based on the information transmitted through the TSS, thereby decreasing complexity in decoding by the terminal.
  • the method described below may be applied to a burst transmission structure as in FIG. 2 g .
  • the PBCH is a physical channel transmitting some or all of minimum system information (minimum SI) in a 3GPP New RAT standard.
  • the PBCH also needs to be transmitted through beam sweeping, and in the present disclosure, it is assumed that a TSS transmission burst set and a PBCH transmission burst set have the same period.
  • An actual PBCH transmission period may be larger than the PBCH transmission burst set period due to repetitive transmission.
  • a transmission period of the PBCH may be fixed regardless of a period of a burst set transmitting a measurement signal. For example, as shown in FIG. 2L , in the case in which the transmission period of the PBCH is fixed to 4 frames, if a period of the measurement signal transmission burst set is 2 frames, the same PBCH information is repeated twice for the transmission period of the PBCH (this is to perform more robust PBCH information decoding).
  • a scrambling sequence needs to be changed for every frame in a PBCH period, and the terminal needs to bear somewhat high PBCH blind decoding complexity in order to find out an accurate system frame number.
  • the corresponding information may be acquired through the TSS, at the time of PBCH transmission, the smaller number of scrambling sequences may be used, thereby decreasing decoding complexity of the terminal.
  • ⁇ Situation 2 A case in which a PBCH transmission period is changed according to an entire size of a burst set transmitting the corresponding measurement signal or the number of occupied slot/subframe>
  • a transmission period of the PBCH is 4X subframes.
  • a scrambling sequence c n f (i) has a period of Q.
  • a scrambling sequence c n f (i) applied to a PBCH transmitted in a n j -th frame and a scrambling sequence (i) applied to a PBCH transmitted in a n f + -th frame are the same as each other.
  • the following information may be included in a PBCH.
  • One SS block may include some or all of a PSS, SSS, TSS, PBCH, and a reference signal (RS) for PBCH decoding.
  • One OFDM symbol duration is determined based on a subcarrier spacing of a data channel, and one SS block may be configured of a single or a plurality of OPDM symbols or OFDM subsymbols according to a value of the subcarrier spacing transmitting the SS block. For example, if a subcarrier spacing of the data channel is 60 kHz, and a value of a subcarrier spacing used when transmitting the SS block is 240 kHz, the SS block may form a channel configured of four OFDM subsymbols.
  • the reference signal for PBCH decoding may also be used as a RRM measurement reference signal, and the RRM measurement reference signal may be used at the time of beam selection or cell selection/re-selection. Both of the PSS and the SSS may be used for cell-ID detection, or only the SSS may be used for cell-ID detection.
  • the PSS is basically used to estimate initial frequency/time offset.
  • the TSS serves to transmit information such as a slot/frame boundary, SS block number indication in an SS burst, an SS burst size, the number of antenna ports transmitting the RRM measurement reference signal, and the like.
  • the PBCH transmits some or all of minimum SI defined in NR. Embodiments for a method of multiplexing the channels in the SS block will be described below.
  • FIG. 2P is a diagram illustrating an example of multiplexing of a PSS, SSS, TSS, PBCH and reference signal for PBCH decoding.
  • RB represents a resource block
  • RE represents a resource elements.
  • the SSS in addition to the reference signal for PBCH decoding, the SSS may also be used for the PBCH decoding.
  • an order between OFDM symbols or OFDM subsymbols in the SS block may be changed.
  • FIG. 2P is a diagram illustrating an example of multiplexing of a PSS, SSS, TSS, PBCH and reference signal for RRM measurement.
  • the SSS may be used as a reference signal at the time of PBCH decoding.
  • FIG. 2R is a diagram illustrating an example of multiplexing of a PSS, SSS, TSS, PBCH and reference signal for RRM measurement.
  • the PSS and the TSS may be transmitted at a subcarrier spacing corresponding to two times the SS block subcarrier spacing.
  • the SSS may be used as a reference signal at the time of PBCH decoding.
  • FIG. 2S is a diagram illustrating an example of multiplexing of a PSS, SSS, TSS, PBCH and reference signal for RRM measurement.
  • the SSS may be used as a reference signal at the time of PBCH decoding.
  • FIG. 2T is a diagram illustrating an example of multiplexing of a PSS, SSS, TSS, PBCH and reference signal for RRM measurement.
  • the SSS may be used as a reference signal at the time of PBCH decoding.
  • FIG. 2U is a diagram illustrating a configuration of a terminal according to an embodiment of the present disclosure.
  • the terminal may include a transceiver 2 u - 10 , a controller 2 u - 20 , and a memory 2 u - 30 .
  • the controller 2 u - 20 may be defined as a circuit or application-specific integrated circuit or at least one processor.
  • the transceiver 2 u - 10 may transmit and receive a signal to and from other network entity.
  • the transceiver 2 u - 10 may receive system information from the base station, and may receive a synchronization signal or a reference signal.
  • the controller 2 u - 20 may control a general operation of the terminal according to an embodiment suggested in the present disclosure.
  • the controller 2 u - 20 may control the operation of the terminal described with reference to FIGS. 2A to 2T of the present disclosure.
  • the memory 2 u - 30 may store at least one of information transmitted and received through the transceiver 2 u - 10 and information generated through the controller 2 u - 20 .
  • FIG. 2V is a view illustrating a configuration of a base station according to an embodiment of the present disclosure.
  • a configuration of the base station may also be used as a structure of a TRP. Further, the TRP may also be configured as a part of the configuration of the base station.
  • the base station may include a transceiver 2 v - 10 , a controller 2 v - 20 , and a memory 2 v - 30 .
  • the controller 2 v - 20 may be defined as a circuit or application-specific integrated circuit or at least one processor.
  • the transceiver 2 v - 10 may transmit and receive a signal to and from other network entity.
  • the transceiver 2 v - 10 may transmit system information to the terminal, and may transmit a synchronization signal or a reference signal.
  • the controller 2 v - 20 may control a general operation of the base station according to an embodiment suggested in the present disclosure.
  • the controller 2 v - 20 may control the operation of the base station described with reference to FIGS. 2A to 2T of the present disclosure.
  • the memory 2 v - 30 may store at least one of information transmitted and received through the transceiver 2 v - 10 and information generated through the controller 2 v - 20 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
US16/347,440 2016-11-03 2017-11-03 Method and device for controlling transmission power of user equipment in beamforming system Active US10736044B2 (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
KR20160146079 2016-11-03
KR10-2016-0146079 2016-11-03
KR10-2017-0002569 2017-01-06
KR20170002569 2017-01-06
KR10-2017-0015105 2017-02-02
KR20170015105 2017-02-02
KR1020170075747A KR20180049781A (ko) 2016-11-03 2017-06-15 빔포밍 시스템에서 단말의 송신 전력 제어 방법 및 장치
KR10-2017-0075747 2017-06-15
PCT/KR2017/012394 WO2018084626A1 (ko) 2016-11-03 2017-11-03 빔포밍 시스템에서 단말의 송신 전력 제어 방법 및 장치

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/012394 A-371-Of-International WO2018084626A1 (ko) 2016-11-03 2017-11-03 빔포밍 시스템에서 단말의 송신 전력 제어 방법 및 장치

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/983,308 Continuation US11234196B2 (en) 2016-11-03 2020-08-03 Method and device for controlling transmission power of user equipment in beamforming system

Publications (2)

Publication Number Publication Date
US20190268852A1 US20190268852A1 (en) 2019-08-29
US10736044B2 true US10736044B2 (en) 2020-08-04

Family

ID=62185758

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/347,440 Active US10736044B2 (en) 2016-11-03 2017-11-03 Method and device for controlling transmission power of user equipment in beamforming system

Country Status (4)

Country Link
US (1) US10736044B2 (zh)
EP (1) EP3522617A4 (zh)
KR (1) KR20180049781A (zh)
CN (1) CN110140387B (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210058193A1 (en) * 2018-05-11 2021-02-25 Huawei Technologies Co., Ltd. Repeated transmission method and apparatus
US20210195452A1 (en) * 2018-05-10 2021-06-24 Ntt Docomo, Inc. User terminal
US11234196B2 (en) * 2016-11-03 2022-01-25 Samsung Electronics Co., Ltd. Method and device for controlling transmission power of user equipment in beamforming system
US11419067B2 (en) * 2017-10-02 2022-08-16 Lenovo (Singapore) Pte. Ltd. Uplink power control
US11546859B2 (en) * 2018-12-17 2023-01-03 Qualcomm Incorporated Interference control for uplink transmission
US11595905B2 (en) * 2017-03-22 2023-02-28 Idac Holdings, Inc. Methods for performing power control in new radio (NR) systems
US20230078339A1 (en) * 2020-02-13 2023-03-16 Idac Holdings, Inc. Panel selection for uplink transmission in a multi-transmission-reception point (trp) system
US12127133B1 (en) 2024-06-24 2024-10-22 Interdigital Patent Holdings, Inc. Methods for performing power control in new radio (NR) systems

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107959647B (zh) * 2016-10-14 2022-02-25 中兴通讯股份有限公司 多载波系统的符号配置方法及装置、数据解调方法及装置
TWI666946B (zh) * 2016-12-22 2019-07-21 財團法人資訊工業策進會 支援低延遲高可靠性通訊服務之使用者裝置、支援增強型行動寬頻服務之使用者裝置及基地台
WO2018126441A1 (en) * 2017-01-06 2018-07-12 Qualcomm Incorporated Transmitting sounding reference signals in new radio
US11122628B2 (en) * 2017-01-06 2021-09-14 Ntt Docomo, Inc. User equipment apparatus, base station, and random access method
JP7267924B2 (ja) * 2017-02-03 2023-05-02 アイディーエーシー ホールディングス インコーポレイテッド Ｎｅｗ ｒａｄｉｏにおける同期信号バースト、信号設計、およびシステムフレーム獲得
KR102434749B1 (ko) 2017-03-22 2022-08-22 삼성전자 주식회사 통신 시스템에서 파워 헤드룸 정보의 전송 방법 및 장치
WO2018186572A1 (ko) * 2017-04-04 2018-10-11 엘지전자(주) 무선 통신 시스템에서 단말의 데이터 송수신 방법 및 장치
US11223967B2 (en) * 2017-04-18 2022-01-11 Qualcomm Incorporated Techniques to provide energy efficient radio resource management
WO2018199693A1 (ko) * 2017-04-28 2018-11-01 엘지전자 주식회사 랜덤 액세스 수행 방법 및 이를 지원하는 장치
JP6980814B2 (ja) * 2017-05-05 2021-12-15 エルジー エレクトロニクス インコーポレイティドLg Electronics Inc. 無線通信システムにおいてパワーヘッドルームの報告方法及びそのための装置
WO2018222931A1 (en) 2017-06-02 2018-12-06 Intel IP Corporation Beamformed measurement for new radio (nr)
KR102379822B1 (ko) 2017-06-15 2022-03-30 삼성전자 주식회사 빔포밍 시스템에서 단말의 송신 전력 제어 방법 및 장치
CN116669161A (zh) 2017-06-15 2023-08-29 三星电子株式会社 用于控制波束成形系统中的终端的发送功率的方法和装置
JP7114640B2 (ja) 2017-08-10 2022-08-08 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ 通信装置および通信方法
US10945214B2 (en) * 2017-08-18 2021-03-09 Qualcomm Incorporated Uplink power control
US11259252B2 (en) * 2018-07-20 2022-02-22 Qualcomm Incorporated Power control design for non-orthogonal multiple access
WO2020032737A1 (ko) * 2018-08-09 2020-02-13 엘지전자 주식회사 무선 통신 시스템에서 상향링크 전송을 수행하기 위한 방법 및 이를 위한 장치
CN110972246B (zh) * 2018-09-28 2023-09-22 维沃移动通信有限公司 功率控制方法、传输功率控制参数确定方法及相关设备
US11284404B2 (en) * 2019-02-07 2022-03-22 Raytheon Company Apparatus and method for communications in congested radio frequency environments via dynamic usage exchange
US11076344B1 (en) * 2020-01-20 2021-07-27 PanPsy Technologies, LLC Wireless device and wireless network processes for access control
WO2021174260A1 (en) * 2020-02-28 2021-09-02 Qualcomm Incorporated Beam switching upon negative acknowledgement reception
CN111758239B (zh) * 2020-05-25 2023-09-26 北京小米移动软件有限公司 参考信号传输方法、用户设备、网络设备及电子设备
US11405870B1 (en) * 2020-06-10 2022-08-02 T-Mobile Innovations Llc Minimizing uplink interference in wireless networks
CN114745768A (zh) * 2021-01-07 2022-07-12 展讯通信（上海）有限公司 功率控制方法和相关设备
US11894894B2 (en) * 2021-01-15 2024-02-06 Qualcomm Incorporated Network-indicated precoder sequence for uplink transmissions
CN115941139A (zh) * 2021-08-27 2023-04-07 北京三星通信技术研究有限公司 一种训练参考信号的传输方法和装置
WO2024144316A1 (ko) * 2022-12-29 2024-07-04 삼성전자 주식회사 네트워크 협력통신에서 상향링크 기준 신호의 전력 제어 방법 및 장치

Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2276302A1 (en) 2008-04-29 2011-01-19 Da Tang Mobile Communications Equipment Co., Ltd. Method and device for configuring uplink sounding reference signal
US20130077569A1 (en) * 2011-09-22 2013-03-28 Samsung Electronics Co. Ltd. Apparatus and method for uplink transmission in wireless communication systems
US20130102345A1 (en) * 2011-10-19 2013-04-25 Samsung Electronics Co. Ltd. Uplink control method and apparatus in wireless communication system
US20130195002A1 (en) 2012-01-30 2013-08-01 Qualcomm Incorporated Cyclic prefix in evolved multimedia broadcast multicast service with high transmit power
US20130223394A1 (en) * 2010-11-16 2013-08-29 Panasonic Corporation Communication device and srs transmission control method
US20140086167A1 (en) * 2011-03-02 2014-03-27 Lg Electronics Inc. Method and apparatus for transmitting a sounding reference signal by a terminal
US20140105110A1 (en) * 2011-06-29 2014-04-17 Panasonic Corporation Terminal device, base station device, transmission method and transmit power setting method
US20140119228A1 (en) * 2011-07-07 2014-05-01 Huawei Technologies Co., Ltd. Method for configuring reference signal, ue, and enb
US20150016317A1 (en) * 2012-03-17 2015-01-15 Lg Electronics Inc. Method for controlling transmission power of sounding reference signal in wireless communication system and apparatus for same
US20150124673A1 (en) * 2012-05-10 2015-05-07 Sharp Kabushiki Kaisha Terminal, communication method, and integrated circuit
WO2016072052A1 (en) 2014-11-07 2016-05-12 Nec Corporation Hetnet communication system
KR20160062731A (ko) 2014-11-25 2016-06-02 한국전자통신연구원 분산 어레이 매시브 mimo 시스템의 신호 송수신 방법 및 장치
US20160192297A1 (en) 2013-08-01 2016-06-30 Samsung Electronics Co., Ltd. Apparatus and method for adaptive transmission power normalization in wireless communication system
US9414332B2 (en) 2012-04-17 2016-08-09 Ofinno Technologies, Llc Signal power management in a multicarrier wireless device
US20160270086A1 (en) 2015-03-13 2016-09-15 Futurewei Technologies, Inc. System and Method for Interference Coordination in Wireless Communications Systems
US20170019813A1 (en) * 2014-03-20 2017-01-19 Lg Electronics Inc. Method for transmitting d2d signal in wireless communication system and device therefor
US20170033908A1 (en) * 2014-04-20 2017-02-02 Lg Electronics Inc. Method and terminal for transmitting sounding reference signal in wireless communication system
US20170265155A1 (en) * 2014-07-30 2017-09-14 Lg Electronics Inc. Method and device for performing device-to-device synchronization in wireless communication system
US20170290041A1 (en) * 2016-04-01 2017-10-05 Qualcomm Incorporated Sounding reference signal triggering for enhanced carrier aggregation
US20170303215A1 (en) * 2014-09-24 2017-10-19 Lg Electronics Inc. Method for transmitting and receiving signal in wireless communication system and apparatus therefor
US20170374658A1 (en) * 2014-12-31 2017-12-28 Lg Electronics Inc. Method for allocating resource in wireless communication system and apparatus therefor
US20180167895A1 (en) * 2015-06-07 2018-06-14 Lg Electronics Inc. Method for receiving or transmitting sounding reference signal for positioning in wireless communication system and apparatus therefor
US20180213549A1 (en) * 2015-07-13 2018-07-26 Lg Electronics Inc. Method and apparatus for transmitting or receiving data in wireless communication system
US20190037562A1 (en) * 2016-02-05 2019-01-31 Lg Electronics Inc. Method for transmitting sounding reference signal in wireless communication system and apparatus for supporting same
US20190103951A1 (en) * 2016-03-07 2019-04-04 Lg Electronics Inc. Method for transmitting and receiving uplink/downlink data in wireless communication system and apparatus therefor
US20190159191A1 (en) * 2016-07-01 2019-05-23 Lg Electronics Inc. Method for transmitting/receiving uplink signal between base station and terminal in wireless communication system, and device for supporting same
US20190174384A1 (en) * 2016-08-12 2019-06-06 Lg Electronics Inc. Method for changing serving cell in wireless communication system and apparatus therefor
US20190191437A1 (en) * 2016-08-08 2019-06-20 Sony Corporation Communication device, communication method, and program
US20190215217A1 (en) * 2016-09-29 2019-07-11 Lg Electronics Inc. Method for transmitting and receiving signal between terminal and base station in wireless communication system, and apparatus for supporting same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8953478B2 (en) * 2012-01-27 2015-02-10 Intel Corporation Evolved node B and method for coherent coordinated multipoint transmission with per CSI-RS feedback
US9392639B2 (en) * 2013-02-27 2016-07-12 Samsung Electronics Co., Ltd. Methods and apparatus for channel sounding in beamformed massive MIMO systems
CN104468019B (zh) * 2013-09-13 2018-05-11 华为终端有限公司 信号资源的指示方法和设备
CN105490791B (zh) * 2015-11-19 2020-02-04 武汉虹信通信技术有限责任公司 Srs信号发送及触发方法、装置、用户设备和基站

Patent Citations (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2276302A1 (en) 2008-04-29 2011-01-19 Da Tang Mobile Communications Equipment Co., Ltd. Method and device for configuring uplink sounding reference signal
US20110058505A1 (en) 2008-04-29 2011-03-10 Da Tang Mobile Communications Equipment Co., Ltd. Method And Device For Configuring Uplink Sounding Reference Signal
US20130223394A1 (en) * 2010-11-16 2013-08-29 Panasonic Corporation Communication device and srs transmission control method
US20190274132A1 (en) * 2010-11-16 2019-09-05 Sun Patent Trust Communication device and srs transmission control method
US20140086167A1 (en) * 2011-03-02 2014-03-27 Lg Electronics Inc. Method and apparatus for transmitting a sounding reference signal by a terminal
US20140105110A1 (en) * 2011-06-29 2014-04-17 Panasonic Corporation Terminal device, base station device, transmission method and transmit power setting method
US20140119228A1 (en) * 2011-07-07 2014-05-01 Huawei Technologies Co., Ltd. Method for configuring reference signal, ue, and enb
US20130077569A1 (en) * 2011-09-22 2013-03-28 Samsung Electronics Co. Ltd. Apparatus and method for uplink transmission in wireless communication systems
US20130102345A1 (en) * 2011-10-19 2013-04-25 Samsung Electronics Co. Ltd. Uplink control method and apparatus in wireless communication system
US20130195002A1 (en) 2012-01-30 2013-08-01 Qualcomm Incorporated Cyclic prefix in evolved multimedia broadcast multicast service with high transmit power
KR20140126346A (ko) 2012-01-30 2014-10-30 퀄컴 인코포레이티드 높은 송신 전력을 이용한 이벌브드 멀티미디어 브로드캐스트 멀티캐스트 서비스에서의 사이클릭 프리픽스
US20150016317A1 (en) * 2012-03-17 2015-01-15 Lg Electronics Inc. Method for controlling transmission power of sounding reference signal in wireless communication system and apparatus for same
US9414332B2 (en) 2012-04-17 2016-08-09 Ofinno Technologies, Llc Signal power management in a multicarrier wireless device
US20150124673A1 (en) * 2012-05-10 2015-05-07 Sharp Kabushiki Kaisha Terminal, communication method, and integrated circuit
US20160192297A1 (en) 2013-08-01 2016-06-30 Samsung Electronics Co., Ltd. Apparatus and method for adaptive transmission power normalization in wireless communication system
US20170019813A1 (en) * 2014-03-20 2017-01-19 Lg Electronics Inc. Method for transmitting d2d signal in wireless communication system and device therefor
US20170033908A1 (en) * 2014-04-20 2017-02-02 Lg Electronics Inc. Method and terminal for transmitting sounding reference signal in wireless communication system
US20170265155A1 (en) * 2014-07-30 2017-09-14 Lg Electronics Inc. Method and device for performing device-to-device synchronization in wireless communication system
US20170303215A1 (en) * 2014-09-24 2017-10-19 Lg Electronics Inc. Method for transmitting and receiving signal in wireless communication system and apparatus therefor
US20170318491A1 (en) 2014-11-07 2017-11-02 Nec Corporation Hetnet communication system
WO2016072052A1 (en) 2014-11-07 2016-05-12 Nec Corporation Hetnet communication system
US20160191124A1 (en) 2014-11-25 2016-06-30 Electronics And Telecommunications Research Institute Method and apparatus for transmitting/receiving signal in distributed-array massive mimo system
KR20160062731A (ko) 2014-11-25 2016-06-02 한국전자통신연구원 분산 어레이 매시브 mimo 시스템의 신호 송수신 방법 및 장치
US20170374658A1 (en) * 2014-12-31 2017-12-28 Lg Electronics Inc. Method for allocating resource in wireless communication system and apparatus therefor
WO2016146010A1 (en) 2015-03-13 2016-09-22 Huawei Technologies Co., Ltd. System and method for interference coordination in wireless communications systems
US20160270086A1 (en) 2015-03-13 2016-09-15 Futurewei Technologies, Inc. System and Method for Interference Coordination in Wireless Communications Systems
US20180167895A1 (en) * 2015-06-07 2018-06-14 Lg Electronics Inc. Method for receiving or transmitting sounding reference signal for positioning in wireless communication system and apparatus therefor
US20180213549A1 (en) * 2015-07-13 2018-07-26 Lg Electronics Inc. Method and apparatus for transmitting or receiving data in wireless communication system
US20190037562A1 (en) * 2016-02-05 2019-01-31 Lg Electronics Inc. Method for transmitting sounding reference signal in wireless communication system and apparatus for supporting same
US20190103951A1 (en) * 2016-03-07 2019-04-04 Lg Electronics Inc. Method for transmitting and receiving uplink/downlink data in wireless communication system and apparatus therefor
US20170290041A1 (en) * 2016-04-01 2017-10-05 Qualcomm Incorporated Sounding reference signal triggering for enhanced carrier aggregation
US20190159191A1 (en) * 2016-07-01 2019-05-23 Lg Electronics Inc. Method for transmitting/receiving uplink signal between base station and terminal in wireless communication system, and device for supporting same
US20190191437A1 (en) * 2016-08-08 2019-06-20 Sony Corporation Communication device, communication method, and program
US20190174384A1 (en) * 2016-08-12 2019-06-06 Lg Electronics Inc. Method for changing serving cell in wireless communication system and apparatus therefor
US20190215217A1 (en) * 2016-09-29 2019-07-11 Lg Electronics Inc. Method for transmitting and receiving signal between terminal and base station in wireless communication system, and apparatus for supporting same

Non-Patent Citations (9)

* Cited by examiner, † Cited by third party
Title
CATT, Remaining issues for PUSCH support in UpPTS, 3GPP TSG RAN WG1 Meeting #86bis, R1-1608740, XP051148796, Oct. 9, 2016, Lisbon, Portugal Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/.
CATT: "Remaining issues for PUSCH support in UpPTS", 3GPP DRAFT; R1-1608740, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Lisbon, Portugal; 20161010 - 20161014, R1-1608740, 9 October 2016 (2016-10-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051148796
Ericsson, on UL RS for CSI measurements, 3GPP TSG-RAN WG1 #86bis, R1-1609764, XP051149794, Oct. 9, 2016, Lisbon, Portugal Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/.
ERICSSON: "On UL RS for CSI measurements", 3GPP DRAFT; R1-1609764 ON UL RS FOR CSI MEASUREMENTS, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Lisbon, Portugal; 20161010 - 20161014, R1-1609764 On UL RS for CSI measurements, 9 October 2016 (2016-10-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051149794
European Search Report dated Aug. 30, 2019, issued in the European Application No. 17868254.8.
Huawei et al., Principles for Reference Signal Design and QCL Assumptions for NR, 3GPP TSG RAN WG1 Meeting #86, R1-167224, XP051140589, Aug. 21, 2016, Gothenburg, Sweden Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/.
HUAWEI, HISILICON: "Principles for Reference Signal Design and QCL Assumptions for NR", 3GPP DRAFT; R1-167224, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Gothenburg, Sweden; 20160822 - 20160826, R1-167224, 21 August 2016 (2016-08-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051140589
Qualcomm Incorporated, PUSCH in UpPTS, 3GPP TSG RAN WG1 #86bis, R1-1609991, XP051150016, Oct. 9, 2016, Lisbon, Portugal Retrieved from the Internet: URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/.
QUALCOMM INCORPORATED: "PUSCH in UpPTS", 3GPP DRAFT; R1-1609991 PUSCH IN UPPTS, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Lisbon, Portugal; 20161010 - 20161014, R1-1609991 PUSCH in UpPTS, 9 October 2016 (2016-10-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051150016

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11234196B2 (en) * 2016-11-03 2022-01-25 Samsung Electronics Co., Ltd. Method and device for controlling transmission power of user equipment in beamforming system
US11595905B2 (en) * 2017-03-22 2023-02-28 Idac Holdings, Inc. Methods for performing power control in new radio (NR) systems
US11937187B2 (en) 2017-03-22 2024-03-19 Interdigital Patent Holdings, Inc. Methods for performing power control in new radio (NR) systems
US11419067B2 (en) * 2017-10-02 2022-08-16 Lenovo (Singapore) Pte. Ltd. Uplink power control
US11991647B2 (en) 2017-10-02 2024-05-21 Lenovo (Singapore) Pte. Ltd. Uplink power control
US20210195452A1 (en) * 2018-05-10 2021-06-24 Ntt Docomo, Inc. User terminal
US11871258B2 (en) * 2018-05-10 2024-01-09 Ntt Docomo, Inc. User terminal
US20210058193A1 (en) * 2018-05-11 2021-02-25 Huawei Technologies Co., Ltd. Repeated transmission method and apparatus
US11558150B2 (en) * 2018-05-11 2023-01-17 Huawei Technologies Co., Ltd. Repeated transmission method and apparatus
US11546859B2 (en) * 2018-12-17 2023-01-03 Qualcomm Incorporated Interference control for uplink transmission
US20230078339A1 (en) * 2020-02-13 2023-03-16 Idac Holdings, Inc. Panel selection for uplink transmission in a multi-transmission-reception point (trp) system
US12127133B1 (en) 2024-06-24 2024-10-22 Interdigital Patent Holdings, Inc. Methods for performing power control in new radio (NR) systems

Also Published As

Publication number Publication date
KR20180049781A (ko) 2018-05-11
EP3522617A1 (en) 2019-08-07
CN110140387A (zh) 2019-08-16
CN110140387B (zh) 2021-07-06
US20190268852A1 (en) 2019-08-29
EP3522617A4 (en) 2019-10-02

Similar Documents

Publication Publication Date Title
US10736044B2 (en) Method and device for controlling transmission power of user equipment in beamforming system
US11234196B2 (en) Method and device for controlling transmission power of user equipment in beamforming system
US20210392531A1 (en) Method and apparatus for estimating pathloss of pusch in a wireless communication system
US11751185B2 (en) Method for transmitting/receiving signals by using beams in wireless communication system, and device for same
US11411664B2 (en) Method, terminal device, base station, computer readable medium for measuring cross-link interference, and methods and apparatuses for random access preamble allocation, determination, and data transmission
US20220210844A1 (en) Method and apparatus for random access in wireless communication systems
KR102210990B1 (ko) 업링크 전력 제어를 위한 방법 및 장치
US11647519B2 (en) Method for transmitting and receiving downlink signals between terminal and base station in wireless communication system supporting unlicensed band, and device supporting same
EP3282776B1 (en) Method and apparatus for pathloss derivation for beam operation in a wireless communication system
US10686504B2 (en) Method and apparatus for user equipment beamforming operation in a wireless communication system
US10952251B2 (en) Method for performing random access procedure by terminal in wireless communication system supporting unlicensed band and terminal for performing same
US10972239B2 (en) Method and apparatus for CSI-RS setting for beam management in wireless communication system
KR102305906B1 (ko) 무선 통신 시스템에서 상향링크 전송 방법 및 장치
US10764020B2 (en) Uplink signal transmission method and user equipment, and uplink signal reception method and base station
US20190274172A1 (en) Method and apparatus for transmitting and receiving random access channel
US9392552B2 (en) Controlling transmit power of uplink sounding reference signal
US11323887B2 (en) Method for terminal for transmitting uplink signal in wireless communication system supporting unlicensed band, and apparatus supporting method
JP6792944B2 (ja) 端末装置、基地局装置および方法
KR20210013351A (ko) 업링크 전력 제어를 위한 방법 및 장치
KR20160121406A (ko) 비면허 대역을 사용하는 셀룰러 네트워크에서의 자원할당 방법 및 그 장치
US20140213315A1 (en) Method for transmitting sounding reference signal in base station cooperative wireless communication system and apparatus for same
US20240039587A1 (en) System and Method for Inter-cell and Intra-cell Multiple Transmission-Reception Points Communications
KR102443321B1 (ko) 무선 통신 시스템에서 단말의 위상 트래킹 참조 신호 수신 방법 및 이를 지원하는 장치
US20230011025A1 (en) Method and apparatus for communication in network having asymmetric uplink and downlink
US20240235771A9 (en) Method and apparatus for selecting default beam and pathloss reference signal for transmission of uplink control information in wireless communication systems

Legal Events

Date Code Title Description
AS Assignment

Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RYU, HYUNSEOK;LEE, NAMJEONG;PARK, JEONGHO;AND OTHERS;SIGNING DATES FROM 20190410 TO 20190430;REEL/FRAME:049075/0610

FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4